It is a British drama television series, it was produced by the BBC and Starz (US). Series 1 was first released on 28 October 2014, it was about a boy who went missing in France and directed by Tom Shankland. Series 2 was published on 12 October 2016 and is about a girl missing in Germany and directed by Ben Chanan. There are 16 episodes in total, 8 in each series.