Beyond the Known Universe
E1
The Turtles experience outer space and alien life for the first time.
The Moons of Thalos 3
E2
The Turtles and their enemy crash-land on an ice moon and they must put aside their differences in order to survive.
The Weird World of Wyrm
E3
Casey releases a wish-granting alien named Wyrm, who wants his freedom to do whatever he wants to the universe
The Outlaw Armaggon!
E4
A shark-like bounty hunter is hired by Lord Dregg to destroy the turtles, who choose to hide out in an abandoned space station.
Riddle of the Ancient Aeons
E5
The team must journey through an ancient alien temple to get a piece of the black hole generator.But they get an ancient star which marks the Aeons
Journey to the Center of Mikey's Mind
E6
When microscopic aliens invade Mikey's mind, the Turtles have to chase them through the strange world of Mikey's subconscious.
The Arena of Carnage
E7
The turtles are captured and thrown into the Triceratons' battle area.
The War for Dimension X
E8
The Turtles must gain the trust of the Utrom Council in order to find the next piece of the black hole generator.
The Cosmic Ocean
E9
The Turtles journey through an ocean-like area of space.
Trans-Dimensional Turtles
E10
The Turtles are transported to another dimension where they meet their 1980s counterparts and work together to battle Krang.
Revenge of the Triceratons
E11
Donatello is feeling inferior to Fugitoid, but his intellect is put to the test when the Triceratons attack.
The Evil of Dregg
E12
When Raphael loses his fighting mojo, he must overcome his feelings to save his brothers from certain doom.
The Ever-Burning Fire
E13
The team must overcome impossible odds in order to obtain the final Black Hole Generator piece that is located on the planet Magdomar.
Earth's Last Stand
E14
As the team finally reaches Earth, the Fugitoid reveals a horrible secret about his past.
City at War
E15
April faces a deadly, new enemy when she graduates to full Kunoichi; the Turtles must deal with the return of some old foes.
Broken Foot
E16
When Leonardo secretly allies himself with Karai, he gets himself into deeper danger than he could have realized.
The Insecta Trifecta
E17
Raphael must overcome his fear of insects to lead the team when they are forced to battle Stockman-Fly's new insect minions.
Mutant Gangland
E18
Don Vizioso's gang tracks the Turtles with a slew of Anti-Mutant weapons.
Bat in the Belfry
E19
Michelangelo befriends some odd, new superheroes named Wingnut and Screwloose.
The Super Shredder
E20
For the first time, the Turtles encounter something they cannot defeat – the Super Shredder!
Darkest Plight
E21
The Turtle team hunts for their Sensei, but soon realizes they are being hunted as well.
The Power Inside Her
E22
Donatello becomes concerned and decides to test April, only to discover that her psychic abilities are rapidly growing in power.
Tokka vs. the World
E23
When Tokka returns after her presumable death, she finds out that her baby has been taken from her. After realizing this she violently searches for her lost baby.
Tale of Tiger Claw
E24
A dangerous female mutant, by the name of Alopex, appears with a personal vendetta against Tiger Claw. The Turtles, April and Casey try to befriend her, but turns on them and furiously goes after Tiger Claw alone. Unfortunately for her, Tiger Claw has prepared for her unexpected arrival.
Requiem
E25
Super Shredder has returned with even greater vengeance, forcing the Turtles to enlist the combined aid of Splinter, April, Casey, Karai, Shinigami and the Mighty Mutanimals to destroy him once and for all.
Owari
E26
With the demise of their beloved father and Karai incapacitated, the Turtles, April, and Casey, infiltrate Super Shredder's new lair to put an end to Oroku Saki once and for all, no matter what it takes.