The final episode of The Tunnel sees Karl and Elise face a tense and gripping showdown with the Pied Piper. There is also closure at last for Charlie Moreau, as Karl and Olivier uncover the truth about his abduction.
An increasingly isolated Karl makes a major breakthrough in the search for Saban – but his sense of triumph is short-lived when he discovers that someone close to him is in mortal danger.
When Karl and Elise reach a dead end in the case, they both resort to unconventional means in pursuit of the truth. With the body count rising, the stakes could not be higher - but will their gambles pay off?
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