Boris Karloff
Dr. Laurience
Boris Karloff
Dr. Laurience
Anna Lee
Dr. Clare Wyatt
John Loder
Dick Haslewood
Frank Cellier
Lord Haslewood
Donald Calthrop
Clayton
Cecil Parker
Dr. Gratton
Lyn Harding
Prof. Holloway
Clive Morton
Journalist
D.J. Williams
Landlord
L. du Garde Peach
Screenplay
John L. Balderston
Screenplay
Robert Stevenson
Director
Sidney Gilliat
Screenplay
Jack E. Cox
Director of Photography
Michael Balcon
Producer
Alex Vetchinsky
Art Direction
R. E. Dearing
Editor
Hubert Bath
Original Music Composer
Roy Ashton
Makeup Artist
Alfred Roome
Editor