Casts
James Stephenson
as Dr. Paul Venner
Geraldine Fitzgerald
as Dr. Mary Murray
Donald Crisp
as Dr. Drewett
Barbara O'Neil
as Miss Leeming
Montagu Love
as Dr. Blake
Sig Ruman
as Professor Herman Von Reiter
G.P. Huntley
as Dr. Thornton
Richard Ainley
as Dr. Hale
Bruce Lester
as Dr. Bentley
Leonard Mudie
as Mr. Tom Foster
