Back to the Sewer
episodes
When the Time Window is repaired, the Turtles enter it to go home, but instead of ending up back at the lair they are sent on a harrowing trip through the past, present and future.
The Turtles are reunited with Casey and April; Casey is brainwashed by his new martial arts instructor.
The Turtles journey into cyberspace as Cybernauts on a mission to save as much of Master Splinter as they can find.
The engagement ring Casey and Raph pick out for April has powers that Hun and the Purple Dragons want.
While Don collects Splinter's data bits, his brothers are pulled into a war between the Foot and the Purple Dragons.
Serling, desperate to return to his own time, builds a makeshift Time Window.
Cyber Shredder releases a virus that wipes out the turtles' memories.
The Cyber Shredder creates a web portal that will allow him to travel from cyberspace into the real world.
The Turtles find more of Splinter's lost data bits, but they are embedded in the interface of Mikey's favorite online video game, SuperQuest.
Shredder makes the turtles believe they have left cyberspace, when they are really still there giving him important information about how to build a portal.
The Shredder hacks into a computer grid and reprograms every electronic device in New York.
The Justice Force asks Raph to join their ranks after he gets a cape that gives him super powers.
The Turtles and Master Splinter get ready for April and Casey's wedding.