Rod Grant
— Dr. Felix Copper
Joe Davison
— Sam
Raine Brown
— Dr. Holly Croft
Alan Rowe Kelly
— Dr. Melanie Phillips
Jerry Murdock
— Nathan
Jack Amos
— David Armstrong
Carl Burrows
— Turner
Susan Adriensen
— Mutant Secretary
Ted Geoghegan
— Punk Mutant
Michael Gingold
— Mutant Doctor
David Marancik
— Truck Jumping Mutant
Bart Mastronardi
— Plaid Mutant