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
The best episode of "The Tunnel" season 2 is "Episode 1", rated 8.1/10 from 373 user votes. It was directed by N/A and written by N/A. "Episode 1" aired on 3/7/2016 and is rated 0.0 point(s) higher than the second highest rated, "Episode 2".
Elise Wasserman and Karl Roebuck investigate when a couple are abducted from the Channel Tunnel in front of their young daughter. Events take a dramatic turn when a plane crashes into the Channel.
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The hunt for Madeleine becomes a matter of international urgency but Elise's investigation slows as she is forced to keep new evidence from Karl. Further links between the abduction and plane clash are discovered.
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As the investigation continues and terrorists plan a further attack in France, a man comes forward with links to Robert. Elise uncovers disturbing facts about Eryka's past and Karl follows a hunch.
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Karl and Elise receive a tip-off from a woman they believe knows Robert Fournier's whereabouts. But can she be trusted?
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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.
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An anonymous package gives Karl his biggest breakthrough in the case yet. Plus, the investigating team receive a clear and violent warning.
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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.
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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.
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