Inspector Jules Maigret

Charles Laughton

Acting

Johann Radek

Franchot Tone

Acting

Joseph Heurtin

Burgess Meredith

Acting

Bill Kirby

Robert Hutton

Acting

Edna Wallace

Jean Wallace

Acting

Helen Kirby

Patricia Roc

Acting

Gisella Heurtin

Belita

Acting

Comelieu

George Thorpe

Acting

Janvier

William Phipps

Acting

Moers

William Cottrell

Acting

Waiter

Chaz Chase

Acting

Professor Grollet

Wilfrid Hyde-White

Acting

Inspector (uncredited)

Howard Vernon

Acting