Overview
- Filming is underway in and around London after a late September 2025 start, with a planned wrap in February 2026.
- Ambika Mod, Babou Ceesay, Sam Riley, Neve Campbell, Sylvia Hoeks, Goran Kostic and Samuel Barnett join the cast, with roles including a new Black Doves agent, an executive with suspect motives and an emissary offering Sam a lifeline.
- Keira Knightley, Ben Whishaw and Sarah Lancashire return alongside Andrew Buchan, Kathryn Hunter, Ella Lily Hyland, Gabrielle Creevy, Agnes O’Casey and Molly Chesworth.
- The official logline says Helen continues passing secrets as her husband prepares to become Prime Minister, Mrs Reed is drawn into a plot within the Black Doves and Sam struggles to regain his footing.
- Creator Joe Barton returns as writer and executive producer with EPs Jane Featherstone, Chris Fry and Knightley; Julian Farino and Kieron Hawkes direct for Sister and Noisy Bear, and no release date has been announced.