Robert Forster
Prof. Paul Corwin / The Clone
Acting
Adrienne Barbeau
Margaret Corwin
Acting
Ray Milland
Prof. Meredith
Acting
David Sheiner
Prof. Sidney Hillstrom
Acting
John Lehne
Lt. Merholz
Acting
Denise DuBarry
Ann Sweeney
Acting
Jack De Mave
Roger
Acting
Thomas Bellin
Ed Linnick
Acting
Heather Hobbs
Jenny
Acting
Eddie Quillan
Watchman
Acting
Raye Sheffield
Clone
Acting
Russell Shannon
Guard
Acting
James Nolan
Dr. Tapler
Acting
Madeleine Shaner
Audrey Linnick
Acting
Johnny Hock
1st Skater
Acting
Tom Elliott
2nd Skater
Crew
Thomas McGowan
Andrew Pauletta (uncredited)
Acting
John Herman Shaner
Fire Captain (uncredited)
Writing
D.A. Young
Lance (uncredited)
Sound