Alec Guinness

Father Brown

Joan Greenwood

Lady Warren

Peter Finch

Gustave Flambeau

Cecil Parker

The Bishop

Bernard Lee

Inspector Valentine

Sid James

Bert Parkinson

Gérard Oury

Inspector Dubois

Ernest Thesiger

The Vicomte

Ernest Clark

Bishop's Secretary

Everley Gregg

Governess

Austin Trevor

The Herald

Marne Maitland

Maharajah

Noel Howlett

Auctioneer

Eugene Deckers

French Cavalry Officer

Jim Gérald

French Stationmaster

Aubrey Woods

Charlie

John Salew

Station sergeant

Sam Kydd

Scotland Yard sergeant

John Horsley

Inspector Wilkins

Jack McNaughton

Railway Guard

Dino Galvani

Italian Professor