DCI Gene Hunt (Philip Glenister) is back but he's no longer the self-styled "Sheriff of Manchester".
Flanked by his faithful sidekicks, DS Ray Carling (Dean Andrews) and DC Chris Skelton (Marshall Lancaster), and drawn to the action and intrigue of the London Met, Gene turns his attentions to taking on the "southern nancy" criminal scum. However, Gene does not expect to be thrown together with sexy, intelligent, DI Alex Drake.
Single mother to daughter Molly, Alex has rapidly risen through the ranks of the Met and, in the modern world of 2008, skilfully uses psychological profiling to capture suspects. When Alex and her daughter are kidnapped she makes a daring attempt at escape, resulting in a horrific accident.
Alex suddenly finds herself in 1981 interacting with familiar characters, not just from her own life-time, but also from the detailed reports logged by none other than Sam Tyler, which Alex has previously spent months pouring over.
Alex is ripped from her current world of sexual equality and respect in 2008 and finds herself opposite an arrogant fellow DCI in a Two Tone, New Romantic Eighties London with a soundtrack of Adam Ant, Roxy Music and The Human League ringing in her ears.
Alex finds some of Gene's team has dispersed yet others, loyal as ever, are still in tow. Now a technological whizz-kid in the squad's surveillance team, DC Chris Skelton has clearly moved with the times, along with a tight-permed DS Ray Carling who's keen to experience London's nightlife. (Source: BBC Press Office)
Gene and the team investigate a diamond heist following the murder of three London gang members. Alex remains determined to discover if Gene did kill Sam Tyler. After Alex disappears, Gene races off after her leaving Ray, Chris and Shaz to plan a sting operation. Gene tries to get to Alex before she finds out the truth.