Inside the Channel Tunnel, on the borderline between Britain and France, the body of a woman is discovered. French and British police arrive at the scene: Capitaine Elise Wassermann of the French police, and DCI Karl Roebuck from the UK. Elise and Karl realise that they will be forced to collaborate on this highly complex case. Written by Anonymous

The killer uses the internet to very publicly announce his first 'Truth' - that we are not all equal before the law. When Karl and Elise discover that he is using British police servers to host his site, they are wrong-footed - they are obviously dealing with a criminal mastermind. Written by Anonymous

As Suze is recovering in hospital, the killer, nicknamed the Truth Terrorist by Hillier, calls Hillier to inform him he will continue the second truth in France, and later kidnaps a World War 2 veteran. Elise comes to understand that the Truth Terrorist is a mastermind, having covering his tracks thoroughly. What he does not account for is that a runaway teen couple accidentally find Jean-Claude, and are captured by the Truth Terrorist. Written by Anonymous

French police notice occasional vibrations on the live stream, which they determine (via audio analysis) are passing trains. They narrow his location to two cold stores. Karl and Elise search for what turns out to be the correct location. Armed police attempt to apprehend the Truth Terrorist. Written by Anonymous

When the killer contacts Danny to announce his third truth - the treatment of the mentally ill - Karl and Elise's fears are confirmed. Meanwhile, police are becoming increasingly suspicious of Stephen Beaumont. Chuks confronts him about Veronica who has disappeared from his cottage. This is clearly news to Stephen, and Chuks is forced to let him go. Written by Anonymous

As youths are burnt alive, police suspect the hand of the Truth Terrorist once more. They finally make a key arrest. Will this be the end of the killings in this brilliantly tense Anglo-French thriller?

With four truths completed, the police seem to be gaining some ground against their enemy but have no concrete answers. TT's getaway car is found abandoned. It's a police car... Is TT a cop? It's looking increasingly likely as other clues point in that direction as too. Cross-Channel police put together lists of officers, past and present, who fit the profile. Before police have time to take stock, the Truth Terrorist strikes again. Written by Anonymous

French secret services, the DCRI, mount an operation to capture Fabien Vincent. Karl and Elise join them, angry to have their toes trodden on by DCRI agents. Karl returns to his apartment to search for personal links to TT. In France meanwhile, Elise disappears. Her colleagues become frantic with worry that TT has taken her. Written by Anonymous

Karl and Elise sit amongst reams of evidence pointing towards Karl's friend and ex-colleague, Kieran Ashton. Karl is understandably disturbed but there seems to be something else preying on him. Meanwhile, in France, Karl and Elise head off to interview a former friend of Kieran Ashton's wife. Police work fast to trace bank accounts from Kieran Ashton to his new identity of John Sumner. Written by Anonymous

Karl falls apart in the final episode as the Truth Terrorist's change of direction becomes too much to bear. What will be the cost of catching their man? A hair-raising showdown begins.