When a prominent French politician is found dead on the border between the UK and France, detectives Karl Roebuck and Elise Wassermann are sent to investigate on behalf of their respective countries. However, the case takes a surreal turn when a shocking discovery is made at the crime scene, forcing the French and British police into an uneasy partnership.
As the killers second 'truth' comes to light, Karl and Elise cross paths with Stephen Beaumont again.
The team are faced with a race against time as the killer strikes again and this time it's a elderly victim.
Runaway teen Sophie puts her trust in Benji. Whilst the race is on to find a elderly pensioner before he freezes to death at the hands of the killer.
The Truth Terrorist's third truth begins as Benji carries out his Samurai mission. The police hope to use teenage runaway Sophie to help trap the killer.
Karl and Elise's suspicions are rested on Stephen Beaumont as the killers fourth truth begins, but are they chasing the right man?
The killer finally might have been caught as the fifth and final truth incites mob violence in England and France.
When Karl searches Danny's flat things start falling into place. Whilst the French police capture the prime suspect before losing him. Elise goes missing.
As the police get within a hair's breadth of catching the killer, things take a nasty turn for Karl.
The tense crime drama comes to an unmissable climax as Karl falls apart when the Truth Terrorist's change of direction becomes too much to bear.
While Elise Wassermann and Karl Roebuck are back to investigate the case of a French couple who are abducted from the Eurotunnel, the case gets complicated by a plane crash into the Channel.
Finding the Fourniers becomes a matter of national urgency when the crashed plane's black box reveals a terrifying possibility.
As the hunt for the abducted couple continues, a hunch leads Karl to another body. Plus, a man steps forward with intriguing links to their missing man.
As the gripping crime drama continues, Karl and Elise receive a tip-off from a woman they believe knows Robert Fournier's whereabouts. But can she be trusted?
An unexpected revelation threatens to turn Karl's life upside-down. Meanwhile, Eryka reaches out to Elise and Rosa offers the team a cryptic clue.
An anonymous package gives Karl his biggest breakthrough in the case yet. Plus, the investigating team receive a clear and violent warning.
The team are forced to strike a deal with Vanessa. Meanwhile, someone tries to warn Karl off the case and Elise crosses a line she may quickly come to regret.
A lethal attack is launched and Elise and Karl's lives are thrown into jeopardy as the second series of the gripping crime drama ends in a nail-biting showdown.
A burning fishing boat found on the Channel turns into a new case for Karl and Elise in the third and final chapter of the series.
A shocking discovery is made at an immigration removal centre alongside a sinister animation containing a hidden message.
The investigation steps up when Winnie is sent a live rat in a box, with a set of co-ordinates leading to the Pied Piper's latest victim.
As a young mother-to-be helps with their enquiries, a new development threatens to tear Karl and Elise's partnership apart.
Karl makes a foreboding discovery at Elise's apartment, and the pattern of missing people continues.
In the final episode, Karl and Elise face a tense and gripping showdown with the Pied Piper, while the truth about the Moreau abduction is revealed at last.
