Series 4

Police mount urgent searches for two vulnerable autistic young men. Eighteen-year-old Matthew has missed his usual bus home, while 29-year-old Luke has disappeared from his care home.

Police concern mounts for two men. Fifty-eight-year-old Gavin has vanished after giving away money, while a student has disappeared after joining a mysterious church.

Police deal with two different missing people who both may be at risk. Mark has left a troubling note for his wife, while a potentially suicidal woman has vanished.

South Yorkshire Police race against the clock to find two missing women, both of whom are at potential risk of harm from abusive ex-partners.