as Dr. Martin Arrowsmith

as Leora Tozer Arrowsmith

as Gustav Sondelius

as Professor Max Gottlieb

as Dr. Oliver Marchand

as Twyford

as Dr. Tubbs

as Bert Tozer

as Joyce Lanyon

as Terry Wickett

as State Veterinarian

as Sir Robert Fairland

as Pioneer (uncredited)

as Cop (uncredited)

as Mrs. Tozer (uncredited)

as Miss Twyford (uncredited)

as Nurse (uncredited)

as Dr. Hesselink (uncredited)

as Committee Member (uncredited)

as City Clerk (uncredited)

as Committee Member (uncredited)

as Reporter (uncredited)

as Native Mother (uncredited)

as Drunk (uncredited)

as Pioneer Girl (uncredited)

as Italian Uncle (uncredited)

as B.W. Tozer (uncredited)

as Reporter (uncredited)

as West Indies Townswoman at Meeting (uncredited)

as Ship's Passenger (uncredited)

as Old Doctor (uncredited)

as Dignitary at Luncheon (uncredited)

as Little Johnny (uncredited)

as Ship's Passenger (uncredited)

as Henry Novak (uncredited)

as Dignitary (uncredited)

as Intern (uncredited)

as Bartender (uncredited)

as Ship's Officer (uncredited)

as Mrs. Novak (uncredited)

as Little Neighbor (uncredited)

as Ship's Officer (uncredited)