This season of Prime Suspect first aired on 07-04-1991.

DCI Jane Tennison's investigation of a murder is complicated with the unexpected participation of her secret lover in her detective unit.

Assigned to a Vice squad, Detective Jane Tennison investigates a child murder and discovers a sinister link to the police.

This season of Prime Suspect first aired on 07-04-1991.

Detective Tennison investigates a seemingly straightforward drug murder that she believes is linked to a smugly smooth crime boss.

Detective Superintendent Jane Tennison's investigation of the murder of a Bosnian refugee leads her to one, or possibly two, Serbian war criminals determined to silence the last witness to a massacre a decade before.

Retirement looms for Detective Superintendent Tennison, but as her career draws to a close, the body of a missing schoolgirl is found, and the hunt for her killer begins.