Diretor/a
Jacques Tourneur
DIRETOR/A
Elenco (na ordem dos créditos)
Dana Andrews
John Holden
Peggy Cummins
Joanna Harrington
Niall MacGinnis
Doctor Julian Karswell
Maurice Denham
Professor Henry Harrington
Athene Seyler
Mrs. Karswell
Liam Redmond
Mark O'Brien
Reginald Beckwith
Mr. Meek
Ewan Roberts
Lloyd Williamson
Peter Elliott
Kumar
Rosamund Greenwood
Maggie Meek
Brian Wilde
Rand Hobart
Richard Leech
Inspector Mottram
Lloyd Lamble
Detective Simmons
Peter Hobbes
Superintendent
Charles Lloyd Pack
Chemist
John Salew
Librarian
Janet Barrow
Mrs. Hobart (deleted from US print)
Percy Herbert
Farmer (deleted from US print)
Lynn Tracy
Air Hostess (deleted from US print)
Clare Asher
Minor Role(uncredited)
Michelle Aslanoff
Alan Beaton
Man at Lecture(uncredited)
Hyma Beckley
Scientific Conference Audience(uncredited)
Ballard Berkeley
1st Reporter(uncredited)
The Blake Twins
Minor Roles(uncredited)
Ernest Blyth
Man Reading in Library(uncredited)
Wallace Bosco
Train Passenger(uncredited)
Daniel Brown
Demon(uncredited)
Jimmy Cains
Railway Worker(uncredited)
George Curtis
Police Sergeant(uncredited)
Alistair Dick
Richard Duke
Shay Gorman
Narrator(uncredited)(voice)
John Harvey
Hobart's Brother(uncredited)
Laurence Hepworth
Train Guard(uncredited)
Irene Hollis
Walter Horsbrugh
Bates the Butler(uncredited)
Yvette Hosler
Arthur Howell
Robert Howell
Anthony John
Child(uncredited)
Dan Lester
Ticket Collector(uncredited)
Leonard Llewellyn
Airline Passenger(uncredited)
Michael Peake
2nd Reporter(uncredited)
Paul Phillips
Lift Attendant(uncredited)
Anthony Richmond
Urchin(uncredited)
Peggy Scott Sanders
Terry Sartain
Leonard Sharp
Bert Simms
Lab Assistant(uncredited)
Robert Brooks Turner
Hobart Family Member(uncredited)