The next chapter of Blue Lights is on its way! Get ready for #BlueLights Series 4, coming to BBC iPlayer this autumn. Series 1–3 are available to watch now.   Blue Lights follows a group of frontline response officers working in present-day Belfast. Alongside Siân Brooke (Grace), Martin McCann (Stevie), Katherine Devlin (Annie), Nathan Braniff (Tommy) and Frank Blake (Shane), the new series sees the return of Richard Dormer, who played Gerry Cliff in series one, Hannah McClean as solicitor Jen Robinson, and Jonathan Harden as disgraced former Inspector Jonty, in an episode that answers key questions from the past.