Richard Cobb
Cedric Hardwicke
Geoffrey Radcliffe
Vincent Price
Jim (uncredited)
Billy Bevan
Woman (uncredited)
Clara Blore
Minor Role (uncredited)
Stanley Blystone
Policeman (uncredited)
Matthew Boulton
Ed Brady
Miner at Colliery (uncredited)
Chet Brandenburg
Griffin's Secretary (uncredited)
Louise Brien
Charles Brokaw
Jean Brooks
Tom Coleman
Helen Manson
Nan Grey
Frank Coletti
Miner (uncredited)
Harry Cording
Detective (uncredited)
Paul England
Constable Briggs (uncredited)
Rex Evans
Passerby at Willie's House (uncredited)
Mary Field
Prison Governor (uncredited)
Edward Fielding
Raoul Freeman
Cookie (uncredited)
Mary Gordon
Sidney Grayler
Kit Guard
Dr. Frank Griffin
John Sutton
Bill (uncredited)
Frank Hagney
Bobby Hale
Barry Hays
Frank Hill
Chauffeur (uncredited)
Leyland Hodgson
Secretary (uncredited)
Hugh Huntley
Miner at Radcliffe Colliery (uncredited)
George Hyde
Ellis Irving
Boyd Irwin
Dick Johnstone
Inspector Sampson
Cecil Kellaway
Plainclothesman (uncredited)
Colin Kenny
George Kirby
Chaplain (uncredited)
Bruce Lester
George Lloyd
Jack Low
Edmund MacDonald
William Newell
Constable at Coal Train (uncredited)
Frank O'Connor
Footman (uncredited)
Alexander Pollard
Clinic Nurse (uncredited)
Frances Robinson
Willie Spears
Alan Napier
Robert Robinson
Mr. Cotton (uncredited)
Ivan F. Simpson
Constable Tewsbury (uncredited)
Harry Stubbs
Denis Tankard
Cyril Thornton
Bob (uncredited)
David Thursby
Crane Whitley
Fingerprint Expert (uncredited)
Eric Wilton
Ben Jenkins
Forrester Harvey
Ernie Adams
Jimmy Aubrey
Fight Spectator (uncredited)
Walter Bacon
Original Music Composer
Frank Skinner
Director
Joe May
Story
Director of Photography
Milton Krasner
Characters
H.G. Wells
Assistant Director
Phil Karlson
Screenplay
Curt Siodmak
Lester Cole
Costume Design
Vera West
Art Direction
Jack Otterson
Set Decoration
Russell A. Gausman
Hans J. Salter
Visual Effects
John P. Fulton
Editor
Frank Gross
Martin Obzina
Associate Producer
Ken Goldsmith
Sound Engineer
William Hedgcock
Additional Writing
Cedric Belfrage
Sound Supervisor
Bernard B. Brown
Cleo E. Baker
Special Effects
David S. Horsley
Music Director
Charles Previn