George McWhirter Fotheringay
Roland Young
Colonel Winstanley
Ralph Richardson
Constable Winch
Wallace Lupino
Effie
Joan Hickson
Supt. Smithnells
Wally Patch
Toddy Beamish
Mark Daly
Indifference - a God
George Sanders
Observer
Torin Thatcher
San Francisco Cop
Michael Rennie
Major Grigsby
Edward Chapman
Maydig
Ernest Thesiger
Ada Price
Joan Gardner
Maggie Hooper
Sophie Stewart
Bill Stoker
Robert Cochran
Grigsby's Housekeeper
Lady Tree
Mr. Bamfylde
Laurence Hanray
The Colonel's Butler
George Zucco
Director of Photography
Harold Rosson
Writer
Lajos Biró
Director
Lothar Mendes
Producer
Alexander Korda
H.G. Wells
Special Effects
Edward Cohen
Editor
Philip Charlot
Lawrence W. Butler
Costume Design
John Armstrong
Special Effects Supervisor
Ned Mann
Harry Zech
Original Music Composer
Mischa Spoliansky
Production Manager
David B. Cunynghame
Music Director
Muir Mathieson
Sound Director
A.W. Watkins
Set Designer
Vincent Korda
Assistant Director
Imlay Watts
Supervising Editor
William Hornbeck