Arthur B. Woods
Director
Brock Williams
Screenplay
Irving Asher
Producer
Mignon G. Eberhart
Novel
Robert LaPresle
Director of Photography
Basil Woon
Screenplay
Hugh Williams
Dr. Thurlow
Chili Bouchier
Betty Trimmer
Garry Marsh
Dr. Mortimer
Reginald Purdell
Askew
James Stephenson
Inspector Clarke
Glen Alyn
Isabel Simmonds
John Carol
Merridew
Lesley Brook
Mary Cresswell
Robert Rendel
Dr. Fletcher
Aubrey Pollock
Dr. Cresswell
Elsa Buchanan
Syd Crossley
Katie Johnson
Ross Landon
Muriel Pope
Ivy Tresmand