Claude Rains as Dr. Jack Griffin

Gloria Stuart as Flora Cranley

William Harrigan as Dr. Arthur Kemp

Henry Travers as Dr. Cranley

Una O'Connor as Jenny Hall

Forrester Harvey as Herbert Hall

Holmes Herbert as Chief of Police

E. E. Clive as Constable Jaffers

Dudley Digges as Chief Detective

Harry Stubbs as Inspector Bird

Donald Stuart as Inspector Lane

Merle Tottenham as Millie

Robert Adair as Detective Thompson (uncredited)

Edgar Barrier as Radio Announcer (uncredited)

Ted Billings as Villager Playing Darts (uncredited)

Walter Brennan as Bicycle Owner (uncredited)

Robert Brower as Farmer (uncredited)

Mae Bruce as Mary Purdy (uncredited)

Rita Carlyle as Townswoman at Pub (uncredited)

John Carradine as Informer Suggesting Ink (uncredited)

D'Arcy Corrigan as Villager (uncredited)

Jack Deery as Officer in Charge of Barn Capture (uncredited)

Dwight Frye as Reporter (uncredited)

Mary Gordon as Screaming Woman (uncredited)

Bobby Hale as Townsman at Pub (uncredited)

Stuart Hall as Constable (uncredited)

Tiny Jones as Townswoman at Pub (uncredited)

Violet Kemble Cooper as Woman (uncredited)

Crauford Kent as Doctor (uncredited)

Paul Kruger as Constable (uncredited)

John Merivale as Constable (uncredited)

Monte Montague as Cop (uncredited)

Jack Montgomery as Constable (uncredited)

Charles Morton as Party Guest (uncredited)

Bob Reeves as Detective Hogan (uncredited)

Jack Richardson as Official (uncredited)

Tom Ricketts as Old Farmer with Barn (uncredited)

Kathryn Sheldon as Orphanage Worker (uncredited)

Emma Tansey as Old Woman Listening to Radio (uncredited)

Jameson Thomas as Hospital Doctor (uncredited)

Leo White as 2nd Man Calling Police ('Frost')(uncredited)

Bert Young as Railroad Switchman (uncredited)