Episode Title:Slash and Destroy.Episode Description:After Raph's pet box turtle Spike drinks some mutagen, he mutates into a spiky, hulking box turtle mutant, renaming himself "Slash". Slash offers Raph a chance to join with him and form an ultimate ninja team, to which Raph happily accepts, thrilled by the idea of fighting crime side-by-side with his newly mutated buddy. However, Slash's true motives eventually emerge: The demise of Leo, Donnie, and Mikey!