S1, E4: Prequel to the original Prime Suspect series, following the early career of WPC Jane Tennison in 1970s London. Following the arrest of the mysterious 'Oz', the investigation takes an unexpected twist. The Bentleys' plans are nearly blown out of the water by a visit from the police. As Jane's relationship with DI Bradfield develops, her integrity is tested and he asks her to make a decision with huge consequences for her future career.