TMNT OT Bebop & Rocksteady, Good Guys?

[Jasper-X]

So I've just finished watching the original TV show from start to finish, but didn't come across an episode that I remembered as a child. I always remembered an episode when Bebop and Rocksteady decided they were sick of being the bad guys and tried to be good guys with the turtles for the episode. Of course the turtles were skeptical, and of course by the end of the episode they were villains again, but I didnt come across the episode while watching the entire series from start to finish. Am I delusional, or did this ever actually happen in an episode? Maybe I had the idea when I was a kid and I'm remembering it as an entire episode. Does anyone else recall this?