Stimpy re-enters the world of science as a “freelance brain surgeon”. He soon runs out of good brains on which to conduct experiments and removes Ren’s brain.
Stimpy’s Sammy Mantis Jr. fan club kit arrives in the mail and Stimpy is overjoyed. Ren is sick of Stimpy’s crazy obsession with Sammy Mantis, and soon, Stimpy begins stalking the Mantis Man.