The Missing: Season 1, Episode 1

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In 2006, Tony and Emily are horrified when their five-year-old son Oliver goes missing on a family holiday in France. A huge manhunt kicks off, with France's finest detective at the helm of the investigation. In the present day, 8 years on from Oliver's disappearance and Tony and Emily's marriage has come to an end. Tony continues to search for his son, adamant he isn't dead. A shred of evidence appears, alerting Julien Baptiste's attention as he returns to the case.