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