Guest Stars Pierre Cévaër as Bournazel - Assistant Bertillon 1 Nicolas Bouchaud as Maître Weidmann Benoît Tachoires as Chandrot - Inspecteur Thibaud Gitton as Berthier - Inspecteur William Rageau as Assistant Bertillon Gaëtan Peau as Guichard - Inspecteur des Moeurs Aymé Medeville as Julien Fiersi David Lelièvre as Assistant Bertillon 3 Grégoire Monsaingeon as Commissaire principal Fondari Thierry Gibault as Juge d'Instruction Boucard Mathilde Mery as Cécile Jouin Régis Royer as L'Abbé Gardey Johann Cuny as Félicien - l'Inconnu du Bois de Boulogne Salomé Lavenir as Soeur Justine Noé Besin as Jeune homme élégant cabinet Verlot Guillaume Sentou as Dentiste Meg Raphaële Brice as Secrétaire Verlot Cathy Cerda as Mère Supérieure Marie Elisabeth Cornet as Soeur Saint-Lazare David Delannois as Cocher Margerit Dominique Boissel as Invité Vernissage 1 Christophe Allwright as Invité Vernissage 2 Bernard Tiélès as Client vernissage Johnny Secula as Policier accueil Préfecture