Walter Connolly

Father Brown

Paul Lukas

Flambeau

Gertrude Michael

Evelyn Fischer

Robert Loraine

Inspector Valentine

Halliwell Hobbes

Sir Leopold Fischer

Una O'Connor

Mrs. Boggs

E. E. Clive

Sergeant Dawes

Robert Adair

Policeman (uncredited)

Alyce Ardell

Maid (uncredited)

King Baggot

Priest (uncredited)

Bunny Beatty

Jenny (uncredited)

Charles Dunbar

Fruit Vendor (uncredited)

Mary Flynn

Flowershop Girl (uncredited)

Douglas Gerrard

Constable (uncredited)

Donald Gray

Don (as Eldred Tidbury) (uncredited)

Edward Sedgwick