Elenco
Paul Stevens
Doctor Allan Barnes
Claudette Nevins
Pam Albright
Anne Collings
Miss Goodrich
Bill Walker
Lieutenant Martin
Martin Lavut
Michael Radin
Leo Leyden
Doctor Soames
Norman Ettlinger
Professor Quincey
W.B. Brydon
Anderson (as Bill Bryden)
Jim Moran
Jim Moran
Eleanor Beecroft
Mrs. Kelly
Ray Lawlor
Lab Technician
Rudi Linschoten
Mime in Nightmare
Stephen Ker Appleby
Museum Guide (as Steven Appleby)
Alfie Scopp
Paul Elsom
Harry Blackstone
Self (in introduction added to video version) (uncredited)
Nancy Island
Girl Who Is Killed (uncredited)
Paul Nevens
Demon of the Mask (uncredited)
Equipe
Julian Roffman
Director
Julian Roffman
Producer
Nat Taylor
Producer
Louis Applebaum
Original Music Composer
Herbert S. Alpert
Director of Photography
Stephen Timar
Editor
David R. Ballou
Art Direction
Frank Taubes
Screenplay
Sandy Haver
Screenplay
Franklin Delessert
Screenplay
Sandy Haver
Associate Producer
Frank Taubes
Associate Producer
Yvonne Taylor
Associate Producer
William S. Owens
Production Manager
Hugo Wuethrich
Assistant Art Director
Willard W. Goodman
Sound
Dick Vorisek
Sound Recordist
Myron Schaeffer
Music
Louis Applebaum
Conductor
Don Gillies
Choreographer
Jean S. Lenauer
Production Consultant