Teenage Mutant Ninja Turtles

Season 10, Episode 2

Episode Title: The Beginning of the End

Air Date: 1996-09-21

Overview:

While Raphael, Michaelangelo, Donatello and Carter work on restoring Leonardo to his regular self, Mung steals all the plutonium from a power plant in order for Dregg to build a Plutonium Ray to turn Leonardo into a radioactive killer.