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