A quiet suburb in Southern California is terrorized by a mysterious murderous monster living in a cave. As the bodies pile up -- with incriminating banana peels always near by the crime scene -- a group of teens stumble on the guilty party: a 20-million-year-old Schlockthropus, an ape-like creature with a sense of the absurd.

John Landis
as Schlock

Saul Kahan
as Detective Sgt. Wino

Joseph Piantadosi
as Ivan

Eliza Roberts
as Mindy Binerman

Tom Alvich
as Torn Cop

Walter Levine
as Police Thief

Harriet Medin
as Mrs. Blinerman

Eric Sinclair
as Joe Putzman (as Eric Allison)

Charles Villiers
as Cal

Ralph Baker
as Dying Man