SERIES 1: THE TUNNEL: Sees laconic but brilliant detective Karl Roebuck from the UK, and pragmatic, meticulous Commander Elise Wassermann from France joining forces when a French politician is found dead on the border between the two countries. As a shocking discovery is made at the crime scene, the pair forge an uneasy partnership that will be tested on the trail of a killer with a dark and dangerous agenda.

SERIES 2: THE TUNNEL: SABOTAGE: Karl and Elise reunite to investigate a French couple, abducted from the Eurotunnel, leaving behind their traumatised young daughter. But when a plane carrying British and French passengers crashes in the Channel, killing everyone on board, they have far bigger questions to answer.

SERIES 3: THE TUNNEL: VENGEANCE: is set amidst post-Brexit hysteria, an escalating refugee crisis and the increasing threat of terror occasioned by disenfranchised, exiled souls on whom society has turned its back. Karl and Elise take on a toxic and terrifying folie a deux whose mutual defining quality is an existential deathwish. When the question posed by the couple--what is a life worth?--is directed straight back at Karl, he is forced to confront an utterly impossible choice that will haunt us long after the closing credits.