After their discovery in Adam's house, Gemma and Julien get Sam and together they face a desperate race against time to track Alice and Sophie's abductor down.
He's in the mountains of Switzerland now, but will they find any clues that lead them to where he is? What really happened when 'Alice' returned to Eckhausen in 2014? And will Julien make it out alive?
The Missing, BBC1, 9pm
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