Charles Laughton

Inspector Jules Maigret

Franchot Tone

Johann Radek

Burgess Meredith

Joseph Heurtin

Robert Hutton

Bill Kirby

Jean Wallace

Edna Wallace

Patricia Roc

Helen Kirby

Belita

Gisella Heurtin

George Thorpe

Comelieu

William Phipps

Janvier

William Cottrell

Moers

Chaz Chase

Waiter

Wilfrid Hyde-White

Professor Grollet

Howard Vernon

Inspector (uncredited)

Burgess Meredith