The Tunnel(2013)

series - first aired/released 2013-10-16 - audience 7.5

Directed by Anders Engström, Carl Tibbetts, Hettie Macdonald, Mike Barker, Philip Martin

The plot follows detectives Karl Roebuck and Elise Wasserman working together to find a serial killer who left the upper-half body of a French politician and the lower-half of a British prostitute in the Channel Tunnel, at the midpoint between France and the UK. They later learn that the killer—who comes to be nicknamed the "Truth Terrorist"—is on a moral crusade to highlight many social problems, terrorising both countries in the process