Russ Tamblyn

Rico

Jim Davis

Sgt. Martin

John Bloom

The Monster

Shelly Weiss

The Creature

Angelo Rossitto

Grazbo the Evil Dwarf

Anne Morrell

Samantha

William Bonner

Biker

Forrest J. Ackerman

Dr. Beaumont

Bruce Kimball

Biker (uncredited)

Albert Cole

Cop Killed by Creature (uncredited)

Gary Kent

Bob, Beach Boy (uncredited)

Connie Nelson

Laura, Beach Girl (uncredited)

Irv Saunders

Policeman (uncredited)

Lu Dorn

Hippie Girl (uncredited)