American professor John Holden arrives in London for a conference on parapsychology only to discover that the colleague he was supposed to meet was killed in a freak accident the day before. It turns out that the deceased had been investigating a cult lead by Dr. Julian Karswell. Though a skeptic, Holden is suspicious of the devil-worshiping Karswell. Following a trail of mysterious manuscripts, Holden enters a world that makes him question his faith in science.
Cast
Dana Andrews
Dr. John Holden
Peggy Cummins
Joanna Harrington
Niall MacGinnis
Dr. Julian Karswell
Maurice Denham
Professor Henry Harrington
Athene Seyler
Mrs. Karswell
Liam Redmond
Professor Mark O'Brien
Reginald Beckwith
Mr. Meek
Ewan Roberts
Lloyd Williamson
Peter Elliott
Professor K.T. Kumar
Rosamund Greenwood
Mrs. Meek
Brian Wilde
Rand Hobart
Richard Leech
Inspector Mottrarn
Lloyd Lamble
Detective Simmons
Peter Hobbes
Superintendent
Charles Lloyd Pack
Chemist
John Salew
Librarian
Janet Barrow
Mrs. Hobart
Percy Herbert
Farmer
Lynn Tracy
Air Hostess
John Harvey
Hobart's Brother
Alan Beaton
Unknown
Hyma Beckley
Unknown
Ballard Berkeley
Unknown
Ernest Blyth
Unknown
Wallace Bosco
Unknown
Daniel Brown
Unknown
Jimmy Cains
Unknown
George Curtis
Unknown
Richard Duke
Unknown
Shay Gorman
Unknown
Laurence Hepworth
Unknown
Walter Horsbrugh
Unknown
Arthur Howell
Unknown
Anthony John
Unknown
Dan Lester
Unknown
Leonard Llewellyn
Unknown
Michael Peake
Unknown
Paul Phillips
Unknown
Anthony Richmond
Unknown
Peggy Scott Sanders
Unknown
Terry Sartain
Unknown
Leonard Sharp
Unknown
Bert Simms
Unknown
Robert Brooks Turner
Unknown
Crew
Jacques Tourneur
Director
Hal E. Chester
Screenplay, Executive Producer
Charles Bennett
Screenplay
M.R. James
Short Story
Michael Gordon
Editor
Edward Scaife
Director of Photography
Basil Keys
Assistant Director
Frank Bevis
Producer
Ken Adam
Production Design
S.D. Onions
Visual Effects Camera
Robert Lennard
Casting
Betty Lee
Hairstylist
Peter Glazier
Assistant Art Director
Charles Crafford
Sound Effects Editor, ADR & Dubbing
Arthur Bradburn
Sound Recordist
Wally Veevers
Special Effects
George Blackwell
Special Effects
Clifton Parker
Original Music Composer
Muir Mathieson
Music Director
Pamela Gayler
Continuity
R. L. M. Davidson
Production Manager
