A medical researcher is sent to a plague outbreak, where he has to decide priorities for the use of a vaccine.
Ronald Colman
as Dr. Martin Arrowsmith
Helen Hayes
as Leora Tozer Arrowsmith
Richard Bennett
as Gustav Sondelius
A.E. Anson
as Professor Max Gottlieb
Clarence Brooks
as Dr. Oliver Marchand
Alec B. Francis
as Twyford
Claude King
as Dr. Tubbs
Bert Roach
as Bert Tozer
Myrna Loy
as Joyce Lanyon
Russell Hopton
as Terry Wickett
David Landau
as State Veterinarian
Lumsden Hare
as Sir Robert Fairland
