Matt Charman follows 'Treason' with another five-part London-set show, this one tracking a high-stakes summit between the British prime minister and the French president.

James Cosmo, 77, is a Scottish character actor who has appeared in films, including Trainspotting, The Chronicles of Narnia: The Lion, the Witch, and the Wardrobe, Ben-Hur, and Wonder Woman. His TV work includes Game of Thrones, Sons of Anarchy, His Dark Materials, and Jack Ryan.

Suranne Jones’ breakthrough moment came in the early 2000s when she was cast as Karen Phillips in Coronation Street, a role she played for four years. Since then, she’s appeared in shows like Vigil, Scott & Bailey, Vanity Fair and Gentleman Jack.