TMNT 2012 (Season 6)

Synopsis
Taking place after the events of season five, the Turtles, April, and Casey are now alone stopping evil in New York. A mysterious organization called The Dominion plan to bring Kavaxas back from the Underworld and let him wreak havoc on New York, bringing our heroes back for one last adventure.

Teenage Mutant Ninja Turtles

 * Leonardo/Leo (voiced by Seth Green)
 * Donatello/Donnie (voiced by Rob Paulsen)
 * Raphael/Raph (voiced by Sean Astin)
 * Michelangelo/Mikey (voiced by Greg Cipes)

Allies

 * April O'Neal (voiced by Mae Whitman)
 * Casey Jones (voiced by Josh Peck)
 * Hamato Miwa/Karai (voiced by Kelly Hu)
 * Chompy Picasso
 * Hamato Yoshi/Splinter (voiced by Hoon Lee in flashbacks)
 * Callie Wicz/The Hawk (voiced by Katie Cassidy)
 * Shinigami (voiced by Gwendoline Yeo)
 * Ivan Steranko/Rocksteady (voiced by Fred Tatisciore)
 * Anton Zeck/Bebop (voiced by J.B. Smoove)

The Dominion

 * Baxter Stockman (voiced by Phil LaMarr)
 * Ronnie Rivet/Zebrawn (voiced by Jack Griffo)
 * Kavaxas (voiced by Mark Hamill)
 * Kayla Smoak (voiced by Isabella Moner)
 * Xever Montes/Fishface (voiced by Christian Lanz)

Other Recurring Antagonists

 * Marty Rainn/Aftershock (voiced by Grant Gustin)
 * Carmen Diaz/Carmeleon (voiced by Carolyn Lawrence)
 * Jessica Johnson (voiced by Jessica DeCicco)

Out of the Shadows (Parts 1 and 2)
Six months after the events of Wanted: Bebop and Rocksteady, the Turtles, April, Casey, and occasionally some more friends have been fighting mutants. One night however, an encounter with a mutant Mikey names “Zebrawn” leads to the group learning of a new dangerous secret society called “The Dominion”. However, The Dominion has plans to reveal the Turtles to the world.

Day Dreams
They’re back! The Dream Beavers tormented the Turtles four years ago, and have now found a way to return to the Dream Realm, but this time things are different as they’ve found ways to tap into the Turtle’s brains at any time they want.

The Baxter Brigade
During a fight with Fishface, Raph learns who the leader of The Dominion is. Thinking he can take on the leader by himself, he decides to go try; Donnie and Casey continue to fight for April’s affection by showing off their “mad skills”.

Hello, Cruel World
After Baxter’s plans are revealed, the Turtles go to try and stop him; while this is going on, April meets Callie Wicz/The Hawk, a very humanoid hawk mutant who has no idea who or what she is except for that she used to be human until she was hit by a mutagen canister that fell from the sky.