Blue Lights is back! 🚨🚓 Watch Series 4 from 29 Sep on BBC iPlayer. Series 1–3 are available to watch now.   Blue Lights follows a group of response officers working in present-day Belfast. The forthcoming series sees the return of Richard Dormer, who played Gerry Cliff in series one, in an episode that answers important questions from the past. #DramaSeries #Belfast #NorthernIreland