When a French politician’s body is found inside the Channel Tunnel on the border between the UK and France, detectives Karl Roebuck (Stephen Dillane) and Elise Wassermann (Clémence Poésy) investigate on behalf of their respective countries.

Part 3 of 10
The serial killer steps up his cross-Channel campaign, targeting an elderly victim in his “moral” crusade. The race is on for police in Britain and France to identify and capture the murderer before more lives are brutally lost.