Teenage Mutant Ninja Turtles (1987): Season 3, Episode 6

3 - 6: The Old Switcheroo

The personalities of Shredder and Splinter are switched when a device is accidentally activated during a battle between the Turtles and their enemies. As Shredder plans the Turtles' demise and Splinter plans on how to get back to his body, everyone else is clueless.