Transformers Animated season 4

Transformers Animated will finally return for a 4th and truly, final season to properly wrap up the loose ends of the first three seasons.

Plot
In season 4, Megatron and all of the other Decepticons are in prison on Cybertron and the Autobots have returned to Cybertron. Meanwhile on the decepticon's new homeworld, with Ultra Magnus inactive for a majority of the season, Sentinel Prime is now the supreme leader of the autobots. The Fallen has finally awoken for the first time in Centuries. He responds to the activation of the allspark turning into a new powerful source to rebuild their army. He then sends Strika and her very own team to free Megatron and all of the Decepticons to find the All Spark fragments that were still all over earth for he can absorb its power. Jazz and Ironhide will be joining the team too as they find the All spark fragments that are widespread back on Planet Earth. The Constructicons, Soundwave, Swindle, The Starscream Clones, Blackarchina, Waspinator and Humans Villians all return as well. Also in some episodes the autobots learn that the Allspark shards have emitted a powerful residue to created a virus within the cities of a brand source of energon similar to the Allspark's energy. As the season reaches the climax, it reveals a second mcguffin for the decepticons to use for the grand plans for Cybertron and Earth: Vector Sigma. It is a super artificial computer turned into a key created to rebuild the transformer race following the allspark's ejection from cybertron and the end of the great war on cybertron, not only that but characters Sari, Bumblebee, Bulkhead, Ratchet, Arcee and Optimus learn that Prowl somehow still lives only in the allspark matrix, and guides on them future conflicts they will no doubt see. Including the truth about The Fallen, Megatron and Sentinel Magnus plans for these relics.

Episodes

 * A New Era Undone: After the final battle in the last season, the autobots from earth have been hailed as heroes, but Optimus believes it was a good deed. The elite guard transport the decepticon fugitives: Megatron, Shockwave and Lugnut to Trypticon Prison, a former city of Megatron's captial, per Sentinel's orders, he found it ironic since it was their foundation in the great war and now it will be their retirement. Sari is granted asylum despite the autobots on cybertron somewhat disguising, and decides to learn of more of the transformers culture and race. Alpha Trion thanks the autobots for bringing them back the Allspark but in a different container, Sari touches the allspark matrix as one last goodbye, but then a familiar voice in a bluish avatar says her name in a chilling matter. Sentinel Prime places the Allspark Matrix in Fortress Maximus, Alpha heeds Sentinel that must be wery of this choice, that it should be placed within the Vector Sigma chamber where autobot guardians can take care of it properly, but he denies saying the allspark Matrix he calls it must be under his care. Jazz decides to leaves the elite guard and is replaced by Sideswipe. As time goes on autobots: Optimus, Sari, Jazz from earth successfully take down business of corrupted autobots and other straggling decepticons in other cities, while Bulkhead and Bumblebee enjoy their time of celebration and Ratchet and Arcee finally reconcile after 50 years. In another scene shows Sentinel is being interviewed on the news reports in the decagon plaza, along with Optimus Prime. The reports begin a rumor that Optimus will be returning to earth soon as they need to find more of the other remaining decepticons, and has plans for a future magnus role but only if Sentinel has learned how to be responsible, while Sentinel boasts that he will continue lead the autobots to a brighter future.  Then a unit of autobots along with Perceptor and Alpha Trion announce to Optimus on tv that Magnus has awoken and wants an audience with Optimus, quickly they find Ultra Magnus still alive, revealing that he will make a full recovery soon, Sentinel watches from afar and hears that Ultra Magnus is proud of Optimus defeating Megatron and his forces, contracting his words from the pilot episode and as a rewards decides to let him keep the Magnus Hammer. Still uneasy as ever, Sentinel angrily leaves, and goes to Trypticon to make a deal with the devil. In another city, Perceptor and Wheeljack learn of Ratchet's designs of flying autobots, and decides to create additional air warriors to help find the decepticons new home base, as Sentinels orders are too find the homeworld. In trypticon, Megatron and Sentinel make a deal to make Optimus look like a fool, and in return Sentinel wants the information to the decepticons new home world. Megatron agrees, in front of Blitzwing, Shockwave and others, and will transport them to a energon moon, where they can spend the rest of their lives feeding off of energon. So he sends a broadcast, to a decepticon unit: Team Charr, who were last seen in space escaping the wrath of the elite guard in the three parter episode Transwarped. Those Decepticons then reveal to the another accomplice that they can recover Megatron, however they need to intercept a space bridge, luckily for them a small autobot fixup crew has arrived on a nearby moon. Several autobots: Beachcomber, Windcharger, Chromedome, and Towline, attempt to fix the space bridge and are greeted by the Charr team, the episode ends with the fate of them up to the viewers!!!
 * A New Era Undone Part 2: Team Charr arrives, and quickly disguising themselves as autobots to quickly arrive to Trypticon. Then a massive breakout ensues, Sentinel commands the autobots on earth to handle the situation, seeing as though they are the new heroes, meanwhile in trypticon the decepticons bow to Megatron, and at first Blitzwing questions his deal with Sentinel as he wanted to rule Cybertron, however Megatron has far grander plans with not just Cybertron but earth as well, since he learned that the elite guard cannot touch him there, the decepticons and team charr try to use the space bridge in the prison city malfunctions due to the interference of Bumblebee, Bulkhead and Sari and sends them and the prison to earth along with the autobots including other stoways: Alpha Bravo, Ironhide, Jolt.
 * Downtown Blackout: Now stuck on earth the decepticons plan to use Blackout to distract Optimus, Bumblebee, Bulkhead, Ratchet, Jazz, Ironhide, Jolt and Air Raid while they steal an allspark fragment at a construction site. On Cybertron, Sentinel comes up with excuse that Optimus has decided to put his new adopted world first before the people of cybertron, sparking up rampaging riots that the Elite Guard can contain for so long until he returns, Sentinel escapes their wrath for now, but then is influenced by red allspark shard of the Matrix's container do so much more...
 * Devastation: - Part 1:Thanks to the allspark fragment new Constructicons are born who pledge their allegiance to Megatron. Then an allspark fragment is located on Dinobot Island but before they can go the decepticons must help Blackout defeat the Autobots. After defeating the Autobots they go to Dinobot Island and find the constructicons Dirtboss, Mixmaster and Scrapper (Who is no longer Snarl's friend because he went back to the dinobots). It seems the allspark fragment detected was the one inside Dirtboss and the others. As Megatron and the Decepticons go to rip them out of the constructicons the fragments inside both Megatron's constructicons and these other constructicons start to react with each other.
 * Devastation: - Part 2:The autobots finally reach the island and can't see any decepticons so the decide to go to the other side of the island. On their way the see the dinobots fighting over another allspark fragment and after a while they drop it and it falls on the holograph device Prowl left there long ago. Grimlock then grabbed it but then waves of energy started emitting from it blowing Grimlock back. Sari who is also with them is struck into a knockout blow, and suddenly is a voidless area, where she hears the voice of Prowl tell her that she is the key to the future and she must return.. The flashbacks ends when she awakes and sees newborn dinobots: Sludge and Slag were born (Because when Grimlock picked it up it scanned his DNA). The dinobots then join the autobots when Jolt gives each of them an energon treat (to stop them fighting) and become good friends with Jolt. Then after getting to the other side of the Island they are introduced to Devastator the combined form of the constructicons. After defeating the decepticons (who retreated shortly after) the autobots return to their former home on earth and deliver a message to Cybertron that they need help dealing with Megatron, so they spare some autobots but Sentinel doesn't the whole planet coming at Earth.
 * Shriek: After returning to the warehouse where they once lived where they meet Sari who now has gotten better with her powers. Meanwhile, Laserbeak has found an all spark fragment and delivers it to the central processor of Soundwave. After placing the fragment on top of it it starts to glow and Soundwave is brought back to life in a stronger body with new cassettes such as Ravage, Rumble, Frenzy. Soundwave then sends a message to Megatron now knowing he is free telling him that he is in an abandoned warehouse . The decepticons then proceed to get him but unfortunately the autobots picked up the signal so them and Sari go to bring him into custody. On the way they meet Wreck-Gar who joins the team. After arriving Soundwave sends out Rumble and Ravage to fight the autobots. Rumble then stuns the autobots by creating an earthquake while Soundwave gets outside. So the autobots go after Soundwave while Sari and Bumblebee stay behind and fight the cassettes. Then after the fight the three are captured but shortly after the decepticons arrive and free them. The decepticons then escape with Rumble, Ravage and Laserbeak returned to Soundwave.
 * Brawl On Cybertron: Back on Cybertron, various riot protest ensues on Sentinel Prime, for letting Optimus Prime get captured by the decepticon unit on earth, he is saved by the two decepticon criminals Brawl and Barricade who have broken out what is left of Kaon's jail and plan to re-activate the space bridge to get to Megatron on Earth. Law enforcement officer Cheetor volunteers to go after them but his superior Depth Charge says that the elite guard will handle it. Later Cheetor goes after the decepticons without Depth Charge knowing and after tearing through part of Cybertron finds the two at the spacebridge. He then engages them in battle but after a while loses the fight when the new autobot elite guard members equipped with the same combiner technology as jetstorm and jetfire arrive and try to help. After a quick fight with elite guard members Skids and Mudflap the decepticons win and are about to start up the spacebridge when Mudflap and Skids combine and form Skidflap and Cheetor joins the fight once again and after a big fight the decepticons loose and are about to be taken into custody but before the autobots can react the decepticon Barricade activates spacebridge and him and Brawl get to Earth.  The three autobots then return to the elite guard and Cheetor is rewarded for his effort and is asked to join the elite guard and he accepts. Meanwhile, back on Earth Brawl and Barricade, go to the decepticon base and meet up with the others.
 * Swindled: Swindle's escape pod has finally landed but now he's stuck on earth along with the autobots and decepticons so Swindle heads off hoping that he can find someone to do business with. As he starts walking his foot hits an all spark fragment on the ground that he then picks up and upgrades to one of his weapons and continues on. After getting to the city area of Detroit he sees the decepticons Blitzwing and Lugnut looking for an all spark fragment and proceeds to try and sell something to them but then the autobots Ironhide,Air Raid and Jazz show up to stop them. So after the fight, the autobots win and return with the all spark fragment (which was in a trash can that was knocked over during the fight). The decepticons then retreat and Swindle follows them back to their base(an old crashed cybertronian spaceship) expecting them to buy something. When he gets there he sees Blitzwing and Lugnut thrown outside by Megatron. The two decepticons then try to apologize but Megatron says apologizing won't help you fools and proceeds to injure them even more but then Swindle cuts in and asks Megatron if he would like to buy any of his products while at the same time showing him the items. The decepticon leader then sees the allspark fragment inside one of Swindle's weapons and tells the decepticon to give him it. Swindle then replies in saying he can have it for the right price. Megatron then proceeds to take it by force when the autobots Optimus Prime Bumblebee and Bulkhead who had detected the fragment on their scanners show up to take the fragment. The decepticons Blitzwing, Lugnut, Swindle and Megatron try to keep them from getting it and after a fight where Swindle used the weapon to seriously wound Bulkhead the decepticons are beaten by Prime and Bumblebee and they take the fragment, suddenly a voice and form of Prowl speaks to Prime warning them to keep the allspark shards save from Megatron and his master's grasp... After the battle Bulkhead is repaired by Ratchet and Swindle is forced to join the decepticons or be destroyed for losing the fragment.
 * The Cyber Squad: With Megatron freed, The Fallen sends his elite decepticon team known as the Cyber Squad to Cybertron to keep the team of Rodimus Minor made up of Rodimus Minor, Hot Shot, Red Alert, Brawn and Iron Hide's replacement Arcee from reactivating the spacebridge because they were ordered by the High Council consisting of Alpha Trion and Perceptor and Wheeljack behind Sentinel's back to go to Earth and help Optimus Prime and his team. After the Cyber Squad get to Cybertron their leader Darkmount tells the decepticon spies Dead End and Sideways to keep watch and that they must try to stop the autobots team if they arrive. Darkmount, Wildrider and Scorponok go into the city to cause damage to distract the autobots During their actions on Cybertron, The Fallen gives them another assignment to retrieve a key for future purposes... After arriving in the city the decepticons cause a lot of damage when Cheetor shows up and tries to stop them. The decepticons then battle Cheetor and after a quick fight he is defeated but before Wildrider can finish him of Hot Shot and Brawn show up and battle Scorponok and Wildrider and after another quick battle the decepticons have lost but the autobot Brawn is then hit with a critical blow from Darkmount but before he can finish the autobot Hot Shot attacks him and injures him. Hot Rod then grabs Brawn and tries to get to the space bridge. Meanwhile the autobots Rodimus Minor, Red Alert and Arcee show up and activate the space bridge but before they can use it they are attacked by Dead End and Sideways so Rodimus and Arcee battle the two and while they are fighting the autobots Hot Shot and Brawn show up and Red Alert repairs Brawn. After a short battle between the autobots and decepticons the autobots win and are about to pass through the space bridge when Darkmount shows up but before he can stop them Cheetor shows up and attacks him. Thanks to Cheetor the autobots pass through the space bridge and then Cheetor escapes Darkmount. The decepticon team surrenders in defeat and the autobot team joins up with the autobots on Earth, Sentinel arrests the Decepticons in a prison located near Fort Max.
 * Heatwave: Meltdown returns with newfound powers, and creates new mutant creatures and upgrades Colossal Rhodes to combat against the decepticon forces, as Team Charr looks for more fragments when they come across Meltdown. While Strika isn't in the mood for an human alliance, Oil Slick on the other hand learns of Meltdown's powers and attends to experiment him to create a batch of Cosmic Rust against the autobots, in the climax Meltdown turns into a world wide defcon as his power increase tenfold and attempts to turn all of the people Detroit, and even the world into Radiation waste like him, he does fall for good, but Oil Slick's recovers enough of his DNA before his demise, in order to finalize materials needed to tip the scales of their new war. (Note: The Autobots are not in this episode as they are still looking for Constructicons all over the detroit)


 * Bounty Wars: Megatron remembers the other two clones of Starscream were previously in space, so Megatron assigns his old bounty hunter friend Lockdown to go capture them, also Blitzwing, Cyclonus and The Sunstorm Starscream accompanies him, along with Swindle who hitches a ride. In space Lockdown catches the attention of another bounty hunter but he is also an autobot formally another a student Yokitron who contacts the elite guard but to no avail, however Sari, Jazz and Ratchet, Alpha Bravo, Fanzone pickup the signal and accidently transport to Lockdown's ship.
 * Reservoir Bots: The Autobots and Decepticons learn that a power surge of new techno organic energon is emitting in more american cities like New York City, Arizona and the Hoover Dam mostly due to the allspark shard residues spreading all across the country during the reconstruction in previous season . Megatron believes this power could enough to create a new body for himself and power up the city of Trypticon, so he sends the Constructicons, Oil-Slick, Spittor, Brawl, Cyclonus, Barricade and Soundwave to go out looking these rare sites. Soon enough both sides realize the energon is to unstable for a regular transformer to  endure. Dirt Boss however plays gamble and betrays the decepticons having learned how powerful the energon takes the constructicons with him to parts unknown.


 * Survival of the fittest II Part 1: Blackarachnia a former autobot and decepticon returns to current timeline era of Transformers Animated, and reunites with her supposed decepticon allies for the first time since the pilot episode, proposes an alliance to allow her to create a new decepticon army and perhaps take the energon. She finds the Dinobots still stuck on Dinobot Island and takes control of them. Using them only to distract the autobots, which forces Isaac Sumdac and the autobots to rebuild the Dinobots intelligence once they are all defeated finally giving the Dinobots a better role in the team. Meanwhile Blackarchina finds more earth energon in Paris and other cities, her creations Shrapnel, Inferno, and Tigerclaw go by to each city and devour the lot of them. The Constructicons return having found out the Predacons have been taking the energon in these cities and have a battle royale with them forming into Devastator and the process but then Devastator is literally "devastated" when several of the Predacons fuse into a mammoth Monster called Magmatron and defeat him rendering him and the constructicons in stasis... Meanwhile the autobots arrive too late but find out Waspinator is still around one of the cities and attempt to take him in, Ironhide one of Wasp's best friends in the academy is forced to put him down and bring him back to base. Blackarchnia and her predacons return to base having acquired the energon needed for Megatron's new body and soon the "restoration of the decepticon empire".
 * Survival of the fittest II Part 2: Having the latest fruits of her labor at work, Shockwave sends Blackarachnia and her "Predacons" to Cybertron to find the Key to Vector Sigma an artificial super key to a living computer that was able re create new life on Cybertron after the Allspark's separation, this will be used on earth. Somehow she quickly has a second opinion, having learned so much during her times in prehistoric earth takes the key for herself and creates an endless army of Predacons to rule cybertron. By using most of the protoforms from the Dojo of Yokitron, she manages to create an unstoppable army of Predacons. Nearly defeating the Elite Guard, and Ultra Magnus, she also creates a clone of both Optimus and Sentinel called Primal Prime. The autobots on earth finish rounding up the Constructicons on earth and study Wasp's new Predacon form. Then they are then forced to have the humans take Dirt Boss and the others to a new fortified prison for transformers and alike when they learn of an attack led by Blackarchina has been created endless army of Predacons. By the time they transport to Cybertron it is quickly overrun, the newly programmed Dinobots are itching for a fight, meanwhile Optimus and the earth autobots race to find Sentinel prime, but they are under attack by Predacons: Tantrum, Quickstrike and Primal Prime. The Predacons are stronger than the autobots and when they work together its seemgly a whole new level. As the Dinobots find Shrapnel and Bombshell they are able deal a serious blow to the Predacon army, they find the other autobots and elite guard dealing with a giant grotesque Inferno and Slasher. Optimus Prime loses his axe to his clone who smashes his face plate and axe in so hard. Sentinel jumps on Primal who transforms into a Gorilla much disguistment of Sentinel and beats him up too, it isn't until Slasher reports the Predacon clones of Shrapnel are gone and the Dinobots are here. The Dinobot leader Grimlock goes off to find his former lover now enemy Blackarachnia on his now, leaving Sludge in charge of the Dinobots and they find a bigger fight when multiple Predacons fuse into a big mammoth one, Sentinel Prime then uses Prime's axe to slice  Black's spider arms including the one that contains the Key and threaten to Primal that he'll put her in a deep stasis unless they call off their invasion, then Grimlock shows up and bursts inside the protoform chamber, and fights Primal on one on one. Sentinel is knocked back Blackarachnia who wallops him and uses the new blade to nearly behead him but then Sari arrives and distracts Blackarchina,  Optimus grabs the Magnus Hammer and defeats her. She attempts to escape with several of the predacons who are transported to earth, Sentinel however throws his shield that damages the Space Bridge coordinates and Blackarachnia  forcibly throws it into a  space bridge that materizalies barely she does it, and she is left caught along with some other predacons. With the threat over, the autobots have time to breathe, but not for long as . To which Sentinel doesn't have any time to mourn the autobots wounded on cybertron as  upon finishing interrogating some of the Cyber Squad, Jetfire and Jetstorm report that Megatron has another accomplice, but Sentinel has already keep surveillance on his new planet since the Megatron came and left Cybertron. Quickly he prepares a strike team, which Optimus is already having doubts, but then a limped Ultra Magnus believes this time Sentinel is perhaps right but first be sure if this could be a situation worth winning so he allows Optimus to go with Sentinel with Optimus having the Magnus Hammer and Ultra Magnus will await their return.
 * Into the Fire: The autobots learn from several decepticons that the Fallen is their man, and the elite guard and some earth autobots led by Sentinel and Optimus Prime who are still looking for the Vector Sigma key's last known coordinates is the  sub leader of cybertron at this point  He secretly uses Powermaster armor a new super form that he thinks can outmatch The Fallen but he soon realizes he has bit off  more than he can swallow. Optimus believe that he should take care of situation since Cybertron has been wounded and they need another leader, since Ultra Magnus is still weak following his near death experience from Shockwave to which Sentinel shrugs him off and goes with Safeguard, and some of the new Elite Guard members and Autotroopers and go off to find The Fallen. In the climax, Sentinel arrives to apocalyptic planet with the whole decepticon army against the elite guard. A scared Sentinel is nearly killed by the Fallen but is saved by Optimus Prime when he tags along, they escape but not before impressing The Fallen. Now Sentinel orders to decommission the space bridges until The Fallen and Megatron make a move on earth, not only severing ties with earth, but with cybertron's sister planets, Ultra Magnus allows Optimus and his team to leave but for now Sentinel will only allow Optimus to transport to Cybertron on his command. Meanwhile the Key to vector sigma is floating endlessly in space due to the mistake of coordinates by Blackarachnia until it is caught in a space ship with very large decepticon symbol on it.
 * Deep Six: During a reformate chamber session in Trypticon, and the infusion of Earth's Energon that was acquired by the Predacons, Megatron's body is boosted into grander heights. Everything seems fine until the decepticons Ramjet the Liar Starscream, Lugnut, Wildrider implant accidental codes for a incomplete triple changer project, rendering Megatron unstable, he goes on a rampage in multiple cities, where the autobots engage. Around this time the constructicons are freed from a transformer human like prison by Shockwave and are given a new leash on life to restore Megatron's mind and body.
 * Operation: R.I.D: A new Transformer Human Hate crime organization with powers similar Slomo frees her and old gang, this new crime organization called R.I.D launch a full scale attack on the autobots and actually gain their equipment from Soundwave and are mind controlled to destroying the autobots once and for all.
 * The Headmaster Reborn: The Headmaster is freed having been paid bail by a new rich figure called Shawn Berger, he equips him with rare cybertronian armor similar to the destroyed Lugnut Supreme and with the help a few human geniuses demands a rematch with Optimus Prime!!!
 * Revelation Part 1: The origins to great war are revealed when Sari taps into Wreck Gar's allspark shard since space bridges on cybertron are gone, she goes to find Prowl still alive for guidance. Prowl navigates Sari to beginning of their lives: The Allspark, the transformers do not know of it, but regardless they all praise it for its existence, for over countless periods of time, the allspark has gave life to a generation of transformers, however peace can be interrupted at any time says Prowl as she is shown the origin of Megatron, revealing to be a fighter turned lieutant, serving under the heel of another called the Fallen, The Fallen created the Decepticons, formally a prime, but was shunned out of the elite guard for his dark designs of the allspark, by attempting terraform populated worlds with its power. Quickly from the shadows he bolstered a city of transformers turning them into the decepticons, The Fallen however was defeated from young Ultra Magnus and with the Magnus Hammer also disfigured his face, badly damaged The Fallen was placed in a stasis chamber, the energon the decepticons had wasn't enough to rebuild him, so Megatron took his place and began a planet wide expansion to destroy all of the autobots outposts, until they found the allspark, however Magnus predicted this and was forced to use the space bridges to eject the allspark, leaving Cybertron slowly a wasteland. Still the decepticons fought with powerful groups: The Decepticon Bridage, Combaticons, Thrulls, led by powerful leaders: Straxus, Onslaught, and Overlord to win the war, that was until in the 21st century, Project Omega was born, a total of 10 Supremes quicken the way to war, Sari sees how destructive Omega Supreme can be if the war continued, showing events where even the Supremes were considered a threat to autobots, as several of them destroyed former autobot outposts, with hostages inside, The decepticons sup groups managed to decimate all of them, but only one survived Omega Supreme, Omega Supreme had enough power to destroy the sup groups and end the war. In the aftermath, Megatron and Magnus signed a treaty to no longer wage war, and were banished from the planet, the decepticons had to find another world, to live.
 * Revelation Part 2: Sari and Optimus Prime learn from another vision from several allspark shards that they gathered from the recent conflicts on earth. Prowl who is within the allspark matrix reveals that knows everything from the transformers now. Sentinel is planning a big invasion on earth to destroy Megatron who is still weak from "Deep Six" and the Fallen again, not knowing that an old decepticon foe exists within the shard. is manipulating him to do the deed, his first act is to knock out Ultra Magnus and places him into stasis. Things get even more horrifying as she learns more of the future wars including the Rise of a foe called UNICRON!! In the future when Optimus is critically wounded from a fight with Megatron and the Fallen, without any one to lead, Megatron and the Fallen fuse the earth with cybertron, with the key to vector sigma and thus Unicron is born, a experimental planet monster that can be consider to end to all, Megatron reformates his body with the allspark matrix and becomes Galvatron a powerful hungry tyrant, who embarked on a new path to kill, and even killed his own troops. Optimus and Sari are convinced now they need to return to Cybertron, however Prowl tells them they won't as Sentinel will arrive in several hours, with the allspark matrix.
 * Countdown to Extinction: Stilll healing from his injuries from the Predacons, Ultra Magnus has temporarily issued Sentinel Prime as the true leader and is placed into stasis by him according to Sentinel. Alpha Trion skeptical about this questions if he truly cares about cybertron and upon revealing his insane plans to the autobot high council in the metroplex, Sentinel arrests the council who argue with his dark designs with using the allspark matrix.  As he begins to invade earth, leaving the planet completely defenseless, all but Skids, Cheetor, several Autotroopers, Mudflap, and Rodimus' s small elite guard forces. Meanwhile on the new decepticon home world, The Fallen begins orders a now mentally stable Megatron to make final preparations upon Trypticon and prepare to destroy the autobots, however Shockwave pickups space bridge signatures, indicating the elite guard have arrived to stop them. Optimus however intervene and attempts to stop Sentinel from doing something that may doom himself and his people, but instead Sentinel but actually Starscream who manifested in allspark shard that was taken out of his head in Endgame, having enough of his crap takes down Optimus, with the elite guard already regretting Sentinel as their leader instead stands up to him and bows to Prime. As sari removes the allspark matrix and finds the shard of Starscream and Ratchets uses the Magnus Hammer and completely shatters it, ending the reign of Starscream forever. Finally the Decepticons make a move, with Optimus leading the elite guard and autobots to try and stop them.
 * The Ultimate Doomsday Part 1:
 * The Ultimate Doomsday Part 1:

In the first three parter series finale, The Fallen arrives on earth with the rest of the decepticons who were all given amnesty after the big battle with the Omega Supremes. Optimus, Omega Supreme and his team and are able to a make a brave attack against Megatron and Trypticon but fall in the process. The Decepticons win, taking most of the earth team prisoner. Around this Cybertron is left defenseless, and Skids and Mudflap once activate the space bridges to find what's going on, as they get the decepticons instead. Meanwhile a small ragtag team led by Sari, Ironhide, Jazz and Arcee are transported on cybertron to call for help but find out Cybertron is under siege by Team Charr and the Cyber Squad who steal and harvest the autobot civilizans in Iacon, to use for Trypticon and for the Key to Vector Sigma that The Fallen has had all along after the Predacon Invasion. The Fallen and Megatron broadcast a planetwide speech and threat to the human race, including Professor Sumdac's fault of granting half of the U.S reverse engineer transformer tech and tell them that they hold the dead man switch, with this Key to Vector Sigma, the world leaders in NYC must make a stand, to which the President agrees and prepares a strike.


 * The Ultimate Doomsday Part 2:

On earth, team charr transports the autobot innocents from cybertron to earth, all while the Cyber Squad along with the Combaticons stay on Cybertron to take control of the autobot's Fortress Maximus. The decepticons meanwhile use the key on earth and begin to create life from unmanned vehicles in Detroit. With the autobots, Detroit's police and elite guard inactive, the world leaders stage an attack against the decepticons, with their attempts falling off deaf ears as the Terrorcons and Trypticon vaporize their army. Meanwhile Sari transports into Iacon where she and her team frees Blackarchina to counteract the decepticons on Cybertron and Earth and reboots Ultra Magnus who tries to help in any way he can. Meanwhile The Fallen reveals his nefarious plans for both Earth and Cybertron as he plans to fuse the key with the Allspark Matrix and use the vehicles of Detroit and other cities to create an endless army of new decepticons called Terrorcons a plan far horrific than the Predacons from Cybertron!!! The Fallen is also planning to combine worlds into one with his spark as the core!!!! Sentinel's betrayal is revealed by the Fallen as he trangulated the signal from Cybertron to the Decepticon's new home from the very first episode of season 4. Sentinel is killed during this outcome. Leaving the elite guard to fend for themselves, suddenly the people of Detroit attempt to fight back the decepticons. Optimus has enough strength to take off Sentinel's Powermaster and fused with Ratchet and Jolt's help into a powered up Powermaster Wing Blade armor. The Autobots back in the fold, rallies each other, and surviving Elite Guard members, telling them for Ultra Magnus's name  to fight on, as the decepticons's new army the Terrorcons seemly got them on the back pedal. That is until Blackarchina's Predacons arrive helping the autobots and Dinobots. Optimus leads them to the Decepticon new operations on cybertron, while Bumblebee, Jolt and Kup help lead an assault against Soundwave, Onslaught, Obsidian in Trypticon.


 * The Ultimate Doomsday Part 3: Series Finale

In the long awaited epic finale to Transformers Animated, Optimus Prime's surviving Autobots, Elite Guard, Dinobots, Predacons, Humans and Omega Supreme duke it out against Megatron and the Fallen's powered up Decepticons, Cyber Squad, Team Charr, Terrorcons, Devastator and Trypticon in one last final all out war. As the Fallen plans reach the final stage, Sari finally learns the entirety of her existence and that she and Optimus are forced by the ghost of Prowl to do something that could eradicate the future for any transformer, autobot, decepticon, Predacon or other alike perhaps forever. In order to prevent the destruction of earth, the rise of Unicron, the rise of Galvatron, many future wars, conflicts to come and evil tyrants beyond, they must use the Magnus Hammer to destroy the Allspark matrix infused with the Key to Vector Sigma!!!

Autobots

 * Autobot Team Commander Wingblade Optimus Prime - Futuristic Semi-trailer truck/fire truck (autobot leader on earth and takes the mantle of Magnus in the future)
 * Autobot Speedster Bumblebee - Sports Supermini
 * Autobot One Bot Wrecking Crew Bulkhead - SWAT Assault Truck
 * Autobot Field Medic Ratchet - Earth ambulance
 * Autobot Super Spy Arcee - Cybertronian car
 * Autobot Techno-organic Sari Sumdac - female human
 * Autobot Cavalier Rodimus Minor - Futuristic 2008 Dodge Challenger/1969 Ferrari Daytona
 * Autobot Pyrotechnics Hotshot - Cybertronian Sports car
 * Autobot Field Medic Red Alert - Cybertronian ambulance van
 * Indestructible Autobot Warrior Ironhide - Cybertronian minibus/Futuristic 2000s GMC truck
 * Autobot Demolitions Brawn - Cybertronian Halftrack
 * Autobot Rookie Wreck-Gar - Garbage truck
 * Autobot Rookie Jolt - Chevy Volt
 * Autobot Rookie Air Raid - Cybertronian jet
 * Sliverbolt - Cybertron jet
 * Skydive - Cybertron jet
 * Slingshot - Cybertron jet
 * Fireflight - Cybertron jet
 * Alpha bravo - Cybertron heilcopter
 * Autobot Heavy Firepower Warrior Omega Supreme - Autobot Spaceship Ark (much larger than before and is the last surviving member of Project Omega)

Autobot Council

 * Autobot Vice-Magnus Alpha Trion

Autobot Elite Guard

 * Autobot Supreme Commander Ultra Magnus - M982 Heavy Expanded Mobility Tactical Truck
 * Autobot Elite Commander Sentinel Prime - Snowplow truck (Takes over as the new planet leader of cybertron, whenever Ultra Magnus has complications with his body if you'd guess it doesn't go so well)
 * Autobot Elita Ninja Jazz - Futuristic Sports car (gives up being member of the Elite Guard after Sentinel doesn't take any kind of responsibility in the role of leadership)
 * Autobot Super Speed Warrior Safeguard
 * Autobot Junior Officer Jetfire - Cybertronian jet
 * Autobot Junior Officer Jetstorm - Cybertronian jet
 * Autobot Junior Officer Skids - Futuristic Chevy Sparks
 * Autobot Junior Officer Mudflap - Futuristic Chevy Sparks
 * Autobot Super Combat Warrior Skidflap
 * Autobot Sky Commander Silverbolt - Cybertronian jet
 * Autobot Combat Instructor Sideswipe - Futuristic Chevy Stingray
 * Autobot Communications Officer Blaster - Cybertronian boombox
 * Autobot Law Inforcement Officer Cheetor - Cybertronian race car
 * Autobot Super Spy Mirage - Blue Cybertronian race car
 * Autobot Super Spy Chromia - Blue Cybertronian car
 * Autobot Elite Security Commander Springer - Green Cybertronian helicopter
 * Autobot Elite Security Roadbuster - Orange Cybertronian race car
 * Autobot Elite Security Leadfoot - Red Cybertronian race car
 * Autobot Elite Security Topspin - Blue Cybertronian race car
 * Autobot Elite Security Guard dog Steeljaw - Cybertronian pit bull
 * Autobot Elite Security Warpath - Cybertronian tank

Dinobots

 * Dinobot Leader Grimlock - Mechanical Tyrannosaurus
 * Dinobot Smasher Snarl - Mechanical Triceratops
 * Dinobot Bombardier Swoop - Mechanical Pteranodon
 * Dinobot Cutter Slag - Mechanical Stegosaurus 
 * Dinobot Defender Sludge - Mechanical Brachiosaurus

Cybertron Intelligence

 * Autobot Intel Agent Cliffjumper - Cybertronian car

Autobot Ministry of Science

 * Autobot Scientist Perceptor - Cybertronian Pickup / Mobile Laboratory


 * Autobot Mechanical Engineer Wheeljack - Cybertronian rally race car

Decepticons

 * Decepticon Leader Megatron - Tiltrotor gunship
 * Decepticon Deep Cover Spy Shockwave - Cybertronian tank/Assault tank
 * Decepticon Berserker Blitzwing - Dual-barreled assault tank/Swing-Wing Fighter jet
 * Decepticon Loyal Lugnut - Futuristic combo Bartini Beriev VVA-14/B-29 Superfortress/Heinkel He 111
 * Decepticon Trickster Blackarachnia - Techno-organic spider
 * Decepticon Captain Brawl - Heavy Tank
 * Decepticon Bounty Hunter Lockdown - Muscle car
 * Decepticon Sonic Warrior Soundwave - Cybertronian jet/Satellite (Formally a creation of Megatron and Isaac Sumdac but evolved into a decepticon, and now finally serves as a decepticon warrior, serving Megatron as a Nuclear Option during the reconstruction of the Decepticon faction)
 * Decepticon Espionage Laserbeak - Flying V Electric guitar
 * Decepticon Retriever Ravage - Mechanical Panther
 * Decepticon Warrior Rumble - Cybertronian Hammer
 * frenzy boombox
 * Decepticon Warrior Overkill - Cybertronian Gun
 * Decepticon Warrior Slugfest - Cybertronian Axe
 * Decepticon Weapons Specialist Swindle - Hummer
 * Decepticon Enforcer Barricade - Police Car
 * Decepticon Mutant Madman Waspinator - Techno-organic wasp
 * Decepticon Mass Destruction Warrior Trypticon (with a moving tail and same size as Omega Supreme) - Formally Decepticon City in Kaon & parts of the Lugnut/Starscream Supremes)

Starscream Clones

 * Decepticon Coward Skywarp - Sukhoi Su-47 Berkut
 * Decepticon Egomaniac Thundercracker - Sukhoi Su-47 Berkut
 * Decepticon Sycophant Sunstorm - Sukhoi Su-47 Berkut
 * Decepticon Liar Ramjet - Sukhoi Su-47 Berkut
 * Decepticon Air Commander Slipstream - Sukhoi Su-47 Berkut (next to Starscream's position as one of Megatron/Galvatron's 2nd lieutenant)
 * Starscream f-22 jet (Physical Body was left in detroit but was found by Wreck-Gar, his sub conscious exist within the allspark matrix)

Constructicons/Devastator

 * Constructicon Foreman Dirt Boss - Forklift
 * Mixmaster - Cement truck
 * Scrapper - Excavator
 * Long Haul - Dump Truck
 * Rampage - Bulldozer 
 * Hightower - Hydraulic Crane

Team Chaar

 * Decepticon General of Destruction Strika - Six Wheeled battle tank
 * Decepticon Aerial General Obsidian - Cybertronian helicopter


 * Decepticon Airborne Soldier Blackout - Cybertronian spacecraft/ Blackhawk (last surviving member of the Decepticon Bridgade from Battle of Iacon, still is meant not to be taken lightly as he executed many of the supremes)


 * Decepticon Saboteur Cyclonus - Cybertronian jet


 * Decepticon Chemical Warfare Oil Slick - Cybertronian Motorcycle


 * Decepticon Waste Disposal Spittor - Cybertronian Walker

The Cyber Squad (The Fallen's elite decepticon squad)

 * Decepticon Team Leader Darkmount - Cybertronian tank (part of a joint faction The Fallen's group and lives on the decepticons new planet after the battle of Iacon)
 * Decepticon Underground Warrior Scorponok - Cybertronian scorpion
 * Decepticon Explosives Expert Wildrider - Black Cybertronian race car
 * Decepticon Super Spy Sideways - Futuristic lambourgini
 * Decepticon Super Spy Dead End - Futuristic ferrari

The Predacons (Blackarchnia's creations)

 * Predacon Commander Primal Prime- Clone of Optimus Prime and Sentinel Prime- Techno Organic Armored Gorilla (the intelligent member of the Predacons's and is Blackarchnia's lover, also has a rivalry with Optimus Prime and Grimlock)
 * Predacon Electrocutioner Quickstriker - Techno Organic Scorpion Crab Hybrid
 * Predacon Bladesmen Slasher- Techno Organic Velociraptor
 * Predacon Berserker Tantrum - Techno Organic Rhino
 * Predacon Divebomber Tigerclaw- Techno Organic Falcon/Tiger Hybrid
 * Predacon Pyromaniac Inferno- Techno Organic Fire Ant
 * Predacon Multiplier Shrapnel- Techno Organic Stag Beetle
 * Predacon Cannibal Kickback- Techno Organic Grasshopper
 * Predacon Chemical Expert Venom - Techno Organic Cicada
 * Predacon Titan Magmatron - Techno Organic Hybrids of Wasps, Wolf, Hawk and Ants

Others
 * Megatronus Prime/The Fallen - Cybertronian Fighter jet and Founder of the Decepticons, He still is Leader of the Decepticons (He had started the war between the autobots and decepticons prior to Ultra Magnus's rise, he was defeated by a younger Ultra Magnus and  was placed in stasis lock by the decepticons who stored his body in a current decepticon homeworld planet. Passing his leadership to his student Megatron, but was awakened by the completion of the matrix and Megatron's capture)
 * Unicron (A universal giant devil like robot is but his essence and mind is a evolved personality within The Fallen's mind and his robot mode as a fusion of Earth and Cybertron in the dystopian futures that Sari, Optimus and the autobots from earth witness)
 * Galvatron ( A futuristic Decepticon warlord seen in Sari's visions, and is actually Megatron rebuild in a new body by the Vector Sigma Key and Allspark Matrix)
 * Cyclonus ( A decepticon warrior sent back from the future for unknown means and is one of the Starscream Clones)
 * Scourge (A decepticon leader of his own army, and is one of the Starscream Clones)
 * Scourge army
 * Nova Magnus
 * Delta Magnus
 * Zeta Magnus (all former Magnus leaders but died prior to the series)
 * Terrorcons (New decepticons given life by the fused Matrix Sigma Key )
 * Demolisher
 * Onslaught
 * Blastoff
 * Dreadwing
 * Tankor
 * Flatline
 * Crowbar
 * Thunderblast (all residents of the new decepticon homeworld after being exiled into deep space by Ultra Magnus and the autobots on cybertron)

Voices

 * David Kaye - Optimus Prime, Lugnut, Grimlock, Cliffjumper, Highbrow, Warpath, Dead End, Primal Prime
 * Corey Burton - Megatron, Ratchet, Longarm Prime/Shockwave, Spike Witwicky, Ironhide (1st voice), Brawn, Deathsaurus, Sunstreaker,
 * Tom Kenny - Starscream (Ghost Only), Thundercracker, Skywarp, Ramjet, Sunstorm, Issac Sumdac, Wasp/Waspinator, Scrapper, Jetfire, Beachcomber, Terrarsaur
 * Jeff Bennett - Soundwave, Ultra Magnus, Prowl, Mixmaster, Captain Fanzone, Grandus, Rumble, Frenzy, Hightower, Brawl, Quickstrike
 * Phil LaMarr - Jazz, Jetstorm, Oil Slick, Alpha Trion, Omega Supreme
 * John DiMaggio - Sideways, Wheeljack, Trypticon, The Motor Master, Spittor, Leadfoot, Inferno
 * Townsend Coleman - Sentinel Prime, Tracks
 * Tara Strong - Sari Sumdac, Slipstream, Red Alert, Strika, Teletran-1, Carly Witwicky, Daniel Witwicky, Shrapnel
 * Bumper Robinson - Bumblebee, Blitzwing, Porter C. Powell, Blackout, Barricade
 * Bill Faggerbakke - Bulkhead, Hot Shot, Cosmos, Topspin
 * Cree Summer - Elita-1/Blackarachnia
 * Susan Blu - Arcee (1st voice), Flareup
 * Judd Nelson - Rodimus Prime
 * Lance Henriksen - Lockdown
 * Fred Willard - Swindle
 * John Mariano - Dirt Boss, Devastator
 * George Takei - Yoketron
 * MacInTalk - Perceptor
 * Diedrich Bader - Ironhide (2nd voice), Bonecrusher, Snarl, Breakdown
 * Kari Wahlgren - Arcee (2nd voice), Drag Strip, Nancy Witwicky, D-Navi
 * Rick D. Wasserman - Cyclonus, Air Raid, Mirage, Rampage
 * Eric Bauza - Bludgeon, Jolt, Roadbuster, Slasher
 * Gilbert Gottfried - Swoop
 * Louie Armstrong - Snarl
 * R. Lee Ermey - Sargent Kup
 * Tricia Helfer - Chromia
 * Richard Steven Horwitz - Scalpel
 * Maurice LaMarche - Sky-Byte, Mindwipe
 * James Remar - Sideswipe, Scorponok
 * Brian Bloom - Springer, Wildrider
 * Dwight Schultz - Whirl, Galvatron
 * Tony Todd - Megatronus Prime/The Fallen/Unicron
 * Peter Cullen - Allspark Matrix in vision (Is not Primus)

Crew

 * Susan Blu - Casting and Voice Director