Synopsis
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
Hyma Beckley

Ballard Berkeley
Ernest Blyth
More like this

Lord of Illusions

The City of the Dead

Cat People

The Innocents

The Fearless Vampire Killers

The Time of Their Lives

The Mummy

Pyewacket

Race with the Devil

The Canterville Ghost

The Night Stalker

The Queen of Spades

Nightbooks

Dead of Night

Unseen

The Man Who Laughs

Bride of Frankenstein

The Hound of the Baskervilles

Dr. Jekyll and Mr. Hyde

The Plague of the Zombies