06/08/2026
Martin Freeman stars in a BBC series that turns everyday London travel into a tense, tightly confined pursuit. The story follows a pragmatic combat veteran as he accompanies a high-functioning sociopath across the city, with the pair relying on municipal transport rather than open streets.
A key element of the production is its use of the iconic black LTI TX4 Hackney Carriage, which functions as a moving setting for sustained conversation. The series leans on the cramped, diesel-powered cab to create an interrogation-room atmosphere, and the filming approach is designed to keep dialogue sequences flowing inside the limited space.
By making the taxi itself central to the suspense, the show offers a fresh way to stage psychological tension in a familiar urban environment. The result is a distinctive procedural texture that keeps attention on how far the investigation can go when the location never changes.