Blue Lights Returns Sept 29 at 9pm

Blue Lights returns on Monday 29 September at 9pm on BBC One and iPlayer for a third series that follows response officers Grace, Annie and Tommy two years into their roles. The season opens with the arrest of a young drug dealer that unravels a vast criminal conspiracy and a new era of global gangs, drawing middle‑class buyers into organised crime through accountants, solicitors and a swanky private members' club run by Cathy Tyson’s Dana Morgan. Sian Brooke reprises Grace, Katherine Devlin is Annie, Nathan Braniff returns as Tommy (his first on‑screen role), Martin McCann plays Stevie and Joanne Crawford is Inspector Helen McNally; Michael Smiley joins as intelligence officer Paul “Colly” Collins, and Angela Griffin directs. Co‑creators Declan Lawn and Adam Patterson say the show expands its focus to examine the professional apparatus that enables organised crime, promising darker, higher‑stakes storytelling. Critics have praised the third series as maintaining the high quality that made the show a BAFTA winner, noting its gripping set pieces and the emotional bonds between officers.