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.
as Dr. John Holden
as Joanna Harrington
as Dr. Julian Karswell
as Professor Henry Harrington
as Mrs. Karswell
as Professor Mark O'Brien
as Mr. Meek
as Lloyd Williamson
as Professor K.T. Kumar
as Mrs. Meek
as Rand Hobart
as Inspector Mottrarn
as Detective Simmons
as Superintendent
as Chemist
as Librarian
as Mrs. Hobart
as Farmer
as Air Hostess
as Hobart's Brother
