Overview
- The season will debut with two episodes on January 14, 2026, followed by weekly installments leading to a February 25 finale.
- According to the official synopsis, a Berlin underground train and its commuters are taken hostage, with Sam Nelson at the center as authorities race to save hundreds of lives.
- The teaser shows Sam boarding the train and reveals a time bomb attached beneath a carriage.
- Returning cast members include Christine Adams, Max Beesley and Archie Panjabi, with new additions Toby Jones, Clare‑Hope Ashitey, Lisa Vicari, Christian Näthe, Karima McAdams and Christiane Paul.
- Created by George Kay and Jim Field Smith, the season is produced by 60Forty Films and Idiotlamp Productions, with Field Smith as lead director and Idris Elba among the executive producers.