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