Guest Stars Mark Heap as Dr. Moers Lucy Cohu as Madame Maigret Shaun Dingwall as Inspector Janvier Leo Staar as Inspector LaPointe Aidan McArdle as Judge Comeliau Tom Wlaschiha as Carl Andersen Kevin McNally as Inspector Louis Grandjean Stephen Wight as Thierry Bertinet Ben Caplan as Isaac Goldberg Dorothy Atkinson as Claire Grandjean Paul Chahidi as Michonnet Mia Jexen as Else Andersen Wanda Opalinska as Jo Jo Robin Weaver as Madame Michonnet Max Wrottesley as Wilmotts Chook Sibtain as Oscar Jonathan Newth as Ambassador Sievens Catherine Kanter as Sarah Goldberg