Drama series about Sam Tyler, a detective who suffers a near-fatal car crash and wakes up in what seems to be 1973. Sam is awoken in the middle of the night by a drunk DCI Hunt, who thinks he's killed someone. While Sam gets to work on proving his colleague's innocence in the shooting of a local underworld bookie, he is monitored by the stand-in DCI, Frank Morgan, a man intent on doing the internal investigation by the book so thoroughly that Sam can't help but be impressed.