Aldo Ray as Fred

Neville Brand as Kurt

Tina Louise as Cora

John Carradine as Dr. Kozmar

Julie Newmar as Dr. Zarma

Karrie Emerson as Nancy

Bridget Holloman as Heather

David Hawk as Brian

G.T. Taylor as Connie

Keith Fisher as Ron

Amber Lynn as Joyce

Jerry Butler as Eddie

Tony O'Dell as Billy

Kimberly Bleier as Alien Guard

Jody Swafford as Girl Applying Lotion

Crystal Breeze as First Girl Having Sex

Shone Taylor as First Guy Having Sex

Kelly Parsons as Laura Lee

Scott Hunter as Young Man on Beach and Garage

Laura Lee as Young Lady on Beach

Bonnie J. Karlyle as Alien Commander

Kari Thompson as Alien Guard

Diana Payne-Myers as Alien Guard

Cynthia Windham as Alien Guard