Charles Guard Director, Screenwriter Thomas Guard Director, Screenwriter Aml Ameen Tempest Actor Colin Morgan Michael O'Hara Actor Mark Strong Holland Actor Felicity Jones Catherine Actor Sophia Brown Ruth Actor Tom Vaughan-Lawlor Keenan Actor Máiréad Tyers Carol Actor Steve Wall Quinn Actor Ronan Bennett Screenwriter, Executive Producer Rebecca L. Brown Producer Chris Coen Producer Brian Coffey Producer Thorsten Schumacher Producer Tiffany Boyle Executive Producer Christelle Conan Executive Producer Laura Grange Executive Producer Mattias Rudh Cinematographer Ted Guard Film Editing Max de Wardener Original Music Tom Sayer Production Design Tanya Miller Art Director Elle Wilson Costume Design Dan Jackson Casting