Guest Stars Mark Heap as Dr. Moers Lucy Cohu as Madame Maigret Leo Staar as Inspector LaPointe Shaun Dingwall as Inspector Janvier Hugh Simon as Dr. Paul Colin Mace as Inspector Lognon Adrian Scarborough as Dr. Bloch Lorraine Ashbourne as Rosa Alfonsi Cassie Clare as Tania Douglas Hodge as Fred Alfonsi Olivia Vinall as Arlette Nicola Sloane as The Countess Adrian Rawlins as Oscar Bonvoisin Tilly Vosburgh as Nathalie Sebastian De Souza as Philippe Martinot Jane Wood as Mme. Aubin Sara Kestelman as Madame Dussardier Niké Kurta as Betty Gyula Mesterházy as Man at Pissoir Simon Gregor as Grasshopper Alexandra Bakonyi as Genvieve