La Dernière Vague - Season 1 Episode 5 Boomerang

Surfers who have lost consciousness after the launch of the drone finally wake up... all except Romain. When Ben returns home, upset by the death of the teenager, Lena finally decides to reveal her pregnancy. In the small town, everyone is shocked by the death of Romain, especially his friends. Yet life must go on – the cloud has vanished, the threat now seems over... Thomas then confides to Ben that the cloud has actually returned, and he's the only one who can see it: it is now covering the entire city... and it won't be long until it strikes again.