Nancy Carroll Marine Bonnet Actor Roger Allam Antoine Verlaque Actor, Executive Producer Keala Settle Hélène Paulik Actor Patricia Hodge Actor Geff Francis Actor Kirsty Bushell Actor Samuel Barnett Actor Christophe Tek Actor Oliver Alvin-Wilson Actor Mary Lou Longworth Writer Chloë Thomas Director Shelagh Stephenson Screenwriter, Executive Producer Debra Hayward Executive Producer Grainne Marmion Producer Alison Owen Executive Producer Alison Carpenter Executive Producer Miguel D'Oliveira Music Annemarie Lean-Vercoe Cinematographer