Hailed as tight and intriguing (Guardian, UK) this powerful crime thriller created and written by Matt Charman (Bridge of Spies) dives into the murky depths of undercover police work and tells the story of a woman willing to risk everything to protect her family. Sheridan Smith (Jonathan Creek, Accused) delivers a powerhouse performance as Jo Gillespie, a police constable who embarks on a dangerous investigation of her husband's death. CC Available.