Richard Mason
Humphrey Bogart
Evelyn Turner
Alexis Smith
Dr. Mark Hamilton
Sydney Greenstreet
Prof. Norman Holdsworth
Charles Drake
Kathryn Mason
Rose Hobart
Professor Norman Holsworth
Charles Drake
Dr. Grant
Grant Mitchell
Egan
Patrick O'Moore
Nora Grant
Ann Shoemaker
Phillips (uncredited)
Edwin Stanley
Robert Freston
Frank Wilcox
Detective Lt. Workman
James Flavin
Guest at Rainbow Lodge (uncredited)
Bess Flowers
Mrs. Allman
Mary Servoss
Pawnbroker #1 (uncredited)
Oliver Blake
Nurse
Doria Caron
Pawnbroker #2 (uncredited)
Harlan Briggs
Cab Driver
Ray Hanson
Pickpocket (uncredited)
John Harmon
Cab Driver
Billy Wayne
Apartment Owner (uncredited)
Mary Servoss
Highway Patrolman
Ralph Dunn
Switchboard Operator (uncredited)
Marjorie Hoshelle
Telephone Operator
Marjorie Hoshelle
Receptionist
Frances Morris
Harris
George Carleton
Prof. Berens
Wallis Clark
Desk Clerk
Jack Mower
Luggage Salesman
Emmett Vogan
Detective Lt. Egan
Pat O'Moore
Bellboy
Bruce Bilson