After a night out with friends, 22-year-old Sian O’Callaghan disappears. Searching for clues, Detective Superintendent Steve Fulcher (Martin Freeman) begins to piece together her last movements. But when the investigation takes an unforeseen turn, Fulcher is faced with a life-changing choice that may cost him his career and his reputation. Siobhan Finneran and Imelda Staunton also star in this six-part crime series.
It begins tonight at 9pm on GBH 44.
BBC