演职人员
Doctor Allan Barnes
Paul Stevens
Pam Albright
Claudette Nevins
Miss Goodrich
Anne Collings
Lieutenant Martin
Bill Walker
Michael Radin
Martin Lavut
Doctor Soames
Leo Leyden
Professor Quincey
Norman Ettlinger
Anderson (as Bill Bryden)
W.B. Brydon
Jim Moran
Jim Moran
Mrs. Kelly
Eleanor Beecroft
Lab Technician
Ray Lawlor
Mime in Nightmare
Rudi Linschoten
Museum Guide (as Steven Appleby)
Stephen Ker Appleby
Self (in introduction added to video version) (uncredited)
Harry Blackstone
Girl Who Is Killed (uncredited)
Nancy Island
Demon of the Mask (uncredited)
Paul Nevens