Teenage Mutant Ninja Turtles

Season 5, Episode 12

Episode Title: Donatello's Duplicate

Air Date: 1991-10-19

Overview:

Donatello decides to create a clone of himself so that he can spend more time on his inventions while his clone spends more time fixing things around the Lair. Donny tests his latest invention on a sewer rat and accidentally gets his hand in the way, causing the rat clone to talk just like Donatello.