Drama series about Sam Tyler, a detective who suffers a near-fatal car crash and wakes up in what seems to be 1973. When CID hear of a dead miner, all roads lead to the notorious cop killer Leslie Johns. Although they now have the know-how to get undercover, A-division are as hurried and unprofessional as ever, and begin to screw up. As Sam questions the dubious ethics behind their methods and motives, he meets Morgan one-on-one - and Morgan has something to tell him. But events unfold disastrously as CID begin to learn the truth about Sam just as the heist is in progress.