Paul Stevens

Doctor Allan Barnes

Acting

Claudette Nevins

Pam Albright

Acting

Anne Collings

Miss Goodrich

Acting

Bill Walker

Lieutenant Martin

Acting

Martin Lavut

Michael Radin

Directing

Leo Leyden

Doctor Soames

Acting

Norman Ettlinger

Professor Quincey

Acting

W.B. Brydon

Anderson (as Bill Bryden)

Acting

Jim Moran

Jim Moran

Acting

Eleanor Beecroft

Mrs. Kelly

Acting

Ray Lawlor

Lab Technician

Acting

Rudi Linschoten

Mime in Nightmare

Acting

Stephen Ker Appleby

Museum Guide (as Steven Appleby)

Acting

Alfie Scopp

Acting

Paul Elsom

Acting

Harry Blackstone

Self (in introduction added to video version) (uncredited)

Acting

Nancy Island

Girl Who Is Killed (uncredited)

Acting

Paul Nevens

Demon of the Mask (uncredited)

Acting