Drama series about Sam Tyler, a Manchester detective who suffers a near-fatal car crash and wakes up in what seems to be 1973. When a bomb warning is reported, A-Division go on red alert. According to the caller, the IRA have brought their mainland bombing campaign to Manchester. Being from 2007, Sam realises the bomb warning reported doesn't fit with his understanding of IRA methods. However when Sam's modern know-how fails and ends up putting his team at risk, they turn their back on him.