Frank Baroni as Miki

Allen Cort as Allan

Keith Kelsch as Ben

James Camp as Wayne

Tody Bernard as Sheriff

John K. Brune as John

Margareth Hanks as Elizabeth

Van Jensens as Indian

Don Perrin as Bartender

Claude File as Oceanographer

Mitzi McCall as Ben's Mother

Charlie Brill as Ben's Father

Laura Gemser as Lab Assistant (uncredited)

Robert LaBrosse as Police Officer (uncredited)