Guest Stars Helen Shingler as Mme. Maigret Joyce Barbour as Concierge Arthur Lawrence as Doctor Norman Mitchell as Gaston Allan McClelland as Armand Michael Golden as Lock-Keeper Constance Wake as Jeanine Nancy Seabrooke as Maid George Little as Jean Richard Burrell as Lombard Alan Tilvern as Van Damme Gerald Cross as Belloir Denis Holmes as Inspector Bergsma
