Planet Earth

Planet Earth is a 2017 American animated comedy film directed by Chris Renaud, written by Chris Renaud and Jordan Roberts. The film also stars the voices of Keegan-Michael Key, Neve Campbell, Jay Baruchel, Kevin Spacey, Clark Duke, Simon Pegg and Max Charles. Produced by Illumination Animated Studios and distributed by Universal Pictures.

Plot
In the town of Carson City, Nevada, Doug Penfold (Jay Baruchel), a 17 year old boy has a new part-time job at the local planetarium and a long-time crush on his neighbor Rachel (Neve Campbell). His dorky and geeky friend Jock (Clark Duke), a big fan of the aliens films. At a barbecue Rachel's family is having, Doug tries to ask her on a date but her hippie friend Rick (John Leguizamo), keeps interrupting with his protest songs.

Just then, a mysterious spacecraft goes into orbit around Earth and sends out a signal. Under a secret Army installation called Base 51, there is a basement filled with Alien Planet artifacts including robotic satellites launched by aliens from space. In the room, a baby alien monster named Snarkl (Chris Renaud) breaks free from his prison and escapes to reunite the newly arrived astronaut. The Army becomes suspicious after Snarkl's escape and begins to investigate.

The mysterious spacecraft touches down in the backyard and an humanoid alien astronaut with purple skin named Clarg Kodblerman (Keegan-Michael Key) emerges. As Clarg plants the flag Bloov (the planet he's from), he steps on a rubber duck someone left on the ground. Everyone stares, and Clarg tries to get back into his ship but Tyler (Max Charles) is in his way, eager for an autograph. Shocked when he realizes he is on an inhabited planet, Clarg runs about wildly and hides at the planetarium as the Army arrives on the scene. Army General Fitzgerald (Kevin Spacey) consults Dr. Harris (Simon Pegg) about the "alien invader". The Army quarantines the area and asks citizens start a local civil defense force to prevent the citizens from becoming "zombies".

At the planetarium, Doug discovers Clarg's hiding place. They are surprised to discover they speak the same language. Realizing this alien is no threat, Doug decides to help Clarg, hiding him in his bedroom for the night. Snarkl finds Clarg, who is very happy to see him again. As the General and his men search Doug's room, the group sneaks back into the planetarium with Clarg, who tells Doug he has "the right stuff". The next morning, the Army takes Clarg's Spaceship to a secret location.

The next night is the première of a new Aliens movie, and Doug, Jock, Tyler and Clarg attend in costumes as fans. Clarg introduces some new music as part of the contest and teaches Doug to dance. Everything goes well until Snarkl arrives. Chaos ensues and Fitzgerald arrives and points out Clarg's Alien Planet Flag insignia is a dead giveaway that he isn't a local. Clarg is captured and unmasked. When Doug tries to keep him from being taken away, Fitzgerald labels Doug a zombie, and Dr. Harris announces he will dissect both their brains. To protect Doug, Clarg pretends to "release" him from his control. Doug is proclaimed a hero, and Clarg and Snarkl are taken away.

At Area 51, Fitzgerald attempts to get some answers out of Clarg, warning that if he tries taking over the minds of the soldiers in the room,  a chain reaction will set off and everyone will shoot at each other and possibly be electrocuted. Clarg accidentally hits a button and starts a  complicated chain reaction with soldiers shooting at each other. Fitzgerald thinks Clarg is resisting his demands and allows Harris to have a go at dissecting Clarg's brain. Doug gets his job back at the planetarium and is permitted to speak about the incident on TV, but he cannot truly accept the honor. He feels terrible about Clarg and decides to do the right thing. While he's hot-wiring a car, Rachel, Jock and Tyler join him to go off to rescue Clarg. The teens know luck is on their side when Snarkl shows up on the edge of town—he made a hole with his claws in the armored vehicle in which he was imprisoned.

Snarkl sniffs out Clarg's trail and leads them to an abandoned gas station outside of town. They look around and Jock sees a soda bottle in an old refrigerator. When he tries to take it, it opens up the entrance to Area 51. Doug has Rick to distract the soldiers guarding the base with his protest group while the rest of them sneak into the base. They find Clarg strapped to a laboratory table, and Harris getting ready to remove his brain. Doug and his friends break in through the ceiling while Snarkl scares away the scientists, technicians, and guards by attacking them. They release Clarg but set off alarms.

Snarkl helps the group find Clarg's spacecraft, which was in a hangar. Fitzgerald warns that, if the alien tries to leave, he will blow up the hangar. Doug tries reasoning with Fitzgerald but  accidentally presses a button that causes the hangar to self-destruct and, in the resulting firestorm, the General is knocked unconscious while ost of the soldiers flee. The teenagers and Rover get into the module, but Clarg rescues the General from the fire. Clarg pilots the ship into orbit around the planet, allowing the teens to experience outer space. Jock and Tyler enjoy the weightlessness, Fitzagerald realizes Clarg hasn't turned him into a zombie, Doug asks Rachel out on a date and Clarg returns to the planet's surface. Although the soldiers are ready to shoot anyone who appears, the General stops them. Finally, the inhabitants of  Carson City  see that Clarg came to their planet for peaceful purposes. Clarg lets Snarkl stay with Jock and says his farewells to the citizens of Carson City. Clarg then leaves Carson City peacefully, accompanied by a dog seen throughout the film (who had sneaked aboard Clarg's ship without anyone noticing).

During the credits, Harris emerges from a manhole cover and faces two former patients who drag him off, telling him that he will "love" brain surgery.

Cast
Jay Baruchel as Doug Penfold

Keegan-Michael Key as Clarg Kodblerman

Clark Duke as Jock Musslo

Max Charles as Tyler Kennedy

Neve Campbell as Rachel Kennedy

Kevin Spacey as General Fitzgerald

Simon Pegg as Dr. Harris

John Leguizamo as Rick Miller