William Oldroyd Director Florence Pugh Katherine Actor Cosmo Jarvis Sebastian Actor Paul Hilton Alexander Actor Naomi Ackie Anna Actor Christopher Fairbank Boris Actor Bill Fellows Dr. Bourdon Actor Joseph Teague Sergeant Reed Actor Ian Conningham Detective Logan Actor Fleur Houdijk Tessa Actor Alice Birch Screenwriter Fodhla Cronin O'Reilly Producer Lizzie Francke Executive Producer Christopher Granier-Deferre Executive Producer Steve Jenkins Executive Producer Christopher Moll Executive Producer Jim Reeve Executive Producer Ari Wegner Cinematographer Nick Emerson Film Editing