Prof. Paul Corwin / The Clone

Robert Forster

Acting

Margaret Corwin

Adrienne Barbeau

Acting

Prof. Meredith

Ray Milland

Acting

Prof. Sidney Hillstrom

David Sheiner

Acting

Lt. Merholz

John Lehne

Acting

Ann Sweeney

Denise DuBarry

Acting

Roger

Jack De Mave

Acting

Ed Linnick

Thomas Bellin

Acting

Jenny

Heather Hobbs

Acting

Watchman

Eddie Quillan

Acting

Clone

Raye Sheffield

Acting

Guard

Russell Shannon

Acting

Dr. Tapler

James Nolan

Acting

Audrey Linnick

Madeleine Shaner

Acting

1st Skater

Johnny Hock

Acting

2nd Skater

Tom Elliott

Crew

Andrew Pauletta (uncredited)

Thomas McGowan

Acting

Fire Captain (uncredited)

John Herman Shaner

Writing

Lance (uncredited)

D.A. Young

Sound