Mindbender is an episode of "The Herculoids" segments in the Space Stars show. It first aired November 21, 1981 on NBC.
Summary[]
While playing, Dorno, Gloop, and Gleep discover and unearth a metal cylinder which contains a big-brained alien. When they release him, he reveals himself to be a member of a race that ruled Quasar thousands of years ago. It is up to the Herculoids to reseal the Mindbender.