Doctor Allan Barnes

Paul Stevens

Acting

Pam Albright

Claudette Nevins

Acting

Miss Goodrich

Anne Collings

Acting

Lieutenant Martin

Bill Walker

Acting

Michael Radin

Martin Lavut

Directing

Doctor Soames

Leo Leyden

Acting

Professor Quincey

Norman Ettlinger

Acting

Anderson (as Bill Bryden)

W.B. Brydon

Acting

Jim Moran

Jim Moran

Acting

Mrs. Kelly

Eleanor Beecroft

Acting

Lab Technician

Ray Lawlor

Acting

Mime in Nightmare

Rudi Linschoten

Acting

Museum Guide (as Steven Appleby)

Stephen Ker Appleby

Acting

Alfie Scopp

Acting

Paul Elsom

Acting

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

Harry Blackstone

Acting

Girl Who Is Killed (uncredited)

Nancy Island

Acting

Demon of the Mask (uncredited)

Paul Nevens

Acting