Claude Rains
Dr. Jack Griffin

Gloria Stuart
Flora Cranley

William Harrigan
Dr. Arthur Kemp

Henry Travers
Dr. Cranley

Una O'Connor
Jenny Hall

Forrester Harvey
Herbert Hall

Holmes Herbert
Chief of Police

E. E. Clive
Constable Jaffers

Dudley Digges
Chief Detective

Harry Stubbs
Inspector Bird

Donald Stuart
Inspector Lane

Merle Tottenham
Millie

Robert Adair
Detective Thompson (uncredited)

Edgar Barrier
Radio Announcer (uncredited)

Ted Billings
Villager Playing Darts (uncredited)

Walter Brennan
Bicycle Owner (uncredited)

Robert Brower
Farmer (uncredited)

Rita Carlyle
Townswoman at Pub (uncredited)

John Carradine
Informer Suggesting Ink (uncredited)

D'Arcy Corrigan
Villager (uncredited)

Dwight Frye
Reporter (uncredited)

Mary Gordon
Screaming Woman (uncredited)

Stuart Hall
Constable (uncredited)

Violet Kemble Cooper
Woman (uncredited)

Crauford Kent
Doctor (uncredited)

Paul Kruger
Constable (uncredited)

John Merivale
Constable (uncredited)

Monte Montague
Cop (uncredited)

Charles Morton
Party Guest (uncredited)

Bob Reeves
Detective Hogan (uncredited)

Jack Richardson
Official (uncredited)

Tom Ricketts
Old Farmer with Barn (uncredited)

Kathryn Sheldon
Orphanage Worker (uncredited)

Jameson Thomas
Hospital Doctor (uncredited)

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