Tcheky Karyo returns as murder investigator Julien Baptiste (who we first encountered in the BBC's acclaimed crime thriller The Missing).

Baptiste’s first series ended with the shocking revelation about Julien’s long-lost biological son Niels.

The second series deals with the psychological toll that such a dark turn of events has on Baptiste, but alongside his inner turmoil, he takes on another troubling case.

When the family of a British Ambassador goes missing in the Hungarian mountains while on holiday, Baptiste delves into the seedy underworld of Budapest to find answers.

He’ll have to go up against a police force he doesn’t trust, unrelenting media interest and his own personal demons.