Episode 2.8 “The Good, the Bad, and Casey Jones” Casey tries to work solo, but then he teams up with Raphael and they fight a common enemy.
Episode 2.6 “Target: April O’Neil” April attempts to be an ordinary teenager again, but she winds up endangering Casey when Karai resumes hunting her.
Episode 2.5 “Mikey Gets Shellacne” Michelangelo plays with some of Donatello’s recent batch of retro mutagen, which contracts a dangerous infection that mutates out of control.
Episode 2.4 “Mutagen Man Unleashed” Donatello obsessively experiments with mutagen in a bid to find a cure for April’s mutated father. Unfortunately this puts April in danger from a new threat–Mutagen Man!
Episode 2.3 “Follow the Leader” When the Turtles face Shredder’s newest threat, an army of Robot Foot Soldiers, Karai captures Leonardo and forces him to do battle with these new and improved ninjas that can adapt to his every move.