Cast
Alec B. Francis
Twyford
Cyril Delevanti
Committee Member (uncredited)
Raymond Hatton
Drunk (uncredited)
Theresa Harris
Native Mother (uncredited)
John Qualen
Henry Novak (uncredited)
A.E. Anson
Professor Max Gottlieb
Lumsden Hare
Sir Robert Fairland
Mike Lally
Reporter (uncredited)
Richard Bennett
Gustav Sondelius
Claude King
Dr. Tubbs
Myrna Loy
Joyce Lanyon
Florence Britton
Miss Twyford (uncredited)
Gibson Gowland
Committee Member (uncredited)
Adele Watson
Mrs. Novak (uncredited)
Ronald Colman
Dr. Martin Arrowsmith
Clarence Brooks
Dr. Oliver Marchand
David Landau
State Veterinarian
Charlotte Henry
Pioneer Girl (uncredited)
DeWitt Jennings
B.W. Tozer (uncredited)
Pat Somerset
Ship's Officer (uncredited)
Helen Hayes
Leora Tozer Arrowsmith
Russell Hopton
Terry Wickett
Erville Alderson
Pioneer (uncredited)
Beulah Bondi
Mrs. Tozer (uncredited)
Sidney De Gray
Dr. Hesselink (uncredited)
Carl M. Leviness
Ship's Passenger (uncredited)
Kendall McComas
Little Johnny (uncredited)
Bert Roach
Bert Tozer
Nora Cecil
Nurse (uncredited)
James A. Marcus
Old Doctor (uncredited)
Eric Mayne
Dignitary at Luncheon (uncredited)
Bobby Watson
Little Neighbor (uncredited)
Ward Bond
Cop (uncredited)
George Humbert
Italian Uncle (uncredited)