Oliver Goldstick Creator, Executive Producer Richard Coyle Paul Sabine Actor Tom Riley Claude Sabine Actor Mamie Gummer Helen Sabine Actor Frances de la Tour Yvette Actor Jenna Thiam Nina Actor Max Deacon Billy Actor Alix Poisson Charlotte Actor Alexandre Brasseur Victor Actor Irène Jacob Marianne Actor Poppy Corby-Tuech Dominique Actor Sarah Parish Marjorie Stutter Actor James Cosmo Jules Trouvier Actor Michael Kitchen Lemaire Actor Allan Corduner Bompard Actor Stanley Townsend Stanley Rossi Actor Michelle Gomez Eliette Actor Dan Zeff Director Dearbhla Walsh Director Anne Thomopoulos Executive Producer Dominik Scherrer Original Music Rachel Freck Casting