Brinke Stevens
— Dr. Leslie Morgan
Tim Abell
— McQueen
Ted Monte
— Milo Tyrrell
J.J. North
— Carla Ferguson
Peter Spellos
— Sergeant Frank Blaine
John Blyth Barrymore
— Dr. Paul Hamilton
Bob Bragg
— Pike
Nikki Fritz
— Susan
Robert Quarry
— Dr. Farrell (as Robert Connell)
Christopher Ray
— Hybrid
Michelle Bauer
— Pin Up (uncredited)
Fred Olen Ray
— Dennis (photo) (uncredited)