Cast (9)

Boris Karloff

Dr. Laurence

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

Crew (11)

Robert Stevenson

Director

John L. Balderston

Screenplay

Sidney Gilliat

Screenplay

L. du Garde Peach

Screenplay

Michael Balcon

Producer

Jack E. Cox

Director of Photography

Hubert Bath

Original Music Composer

R. E. Dearing

Editor

Alex Vetchinsky

Art Direction

Roy Ashton

Makeup Artist

Alfred Roome

Editor