Overview
- The new season unfolds on a Berlin underground train where commuters are taken hostage, with German and UK authorities coordinating the response.
- Apple TV will launch the season on January 14, releasing one episode weekly through March 4.
- Elba describes Sam Nelson as psychologically transformed, calling him "a broken man" whose condition shapes the story.
- Producers rebuilt the U‑Bahn to exact specifications in east London and filmed in Berlin and Dagenham to capture a dynamic, city‑wide crisis.
- Returning cast include Christine Adams, Max Beesley and Archie Panjabi, joined by Toby Jones, Christian Näthe, Clare‑Hope Ashitey, Lisa Vicari, Karima McAdams and Christiane Paul, with executive producers Elba, Jim Field Smith and George Kay and co‑producers 60Forty Films and Idiotlamp.