Episode Title:
The Noxious Avenger.
Episode Description:
When Garson Grunge, a humble garbage man who had encounters with several mutants during his career as a sewer worker, is accidentally mutated into the garbage mutant "Muckman" during a face-off between the Turtles and Bebop and Rocksteady, he gains notoriety as New York City's "Monster Hero" after he saves a man from the Purple Dragons. However, Muckman blames the Turtles for his mutation. The Turtles' situation is complicated further not only when Splinter grounds them for getting caught by a news crew that was following Muckman, but also when Bebop and Rocksteady trick Muckman into helping them find an ingredient for a mind-control serum.
