Underdog (1964)

Season 2: Episode 33

Simon becomes increasingly frustrated with Underdog always stopping him in his endeavors. Cad suggests that the only way to stop him is if he forgot who he was. So Simon embarks on a quest to create an amnesia weapon. His first attempt which has the victim seated in a chair and have a hammer land on their head works, but Cad reads that the machine's not effective on people with hard heads. So Simon tests it on Cad, and finds the latter was right. Finally, Simon reads about creating a Forget-Me-Net, which, when placed over someone, makes them forget who they are. After successfully trying it on a victim, he then sets out to try it on Underdog.