The plot follows the two detectives working together to find a serial killer who left the upper half of a French politician and the lower half of a British prostitute in the Channel Tunnel at the midpoint between France and the UK. The killer is nicknamed the "Truth Terrorist" and is on a moral crusade to highlight many social problems, terrorising both countries in the process.
As the series progresses, the killer's true intention is revealed. Tunnel head writer Ben Richards worked with Hans Rosenfeldt, the creator of the original series. It was produced with both British and French crew members. Some reviewers made favourable comparisons with The Bridge , though others criticised The Tunnel for being identical.
The producers admit that the first episode is a copy of the original. The renewal for a third and final series was announced on 20 January [ 11 ] [ 12 ] entitled The Tunnel: Vengeance and consisting of six episodes.
Elise shares some characteristics with Saga, including driving a Porsche in Elise's case, a Porsche , picking up men from bars for casual sex , and exhibiting behaviour consistent with Asperger syndrome.
The series includes several guest stars. Keeley Hawes guest-starred as Suze Harcourt, a care worker and drug addict, along with Liz Smith , who plays Harriet, an elderly woman under Harcourt's care.
