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