Four lead actors from the BBC police drama Blue Lights in uniform for Series 4. — The ensemble cast returns for the highly anticipated fourth series of the award-winning BBC drama Blue Lights. Courtesy: BBC.

BBC Unveils First-Look Teaser for Blue Lights Series 4: Cast Returns and Autumn Release Window Confirmed

The BBC has released the first-look teaser for the fourth series of the award-winning drama Blue Lights, which is scheduled to premiere this autumn on BBC iPlayer and BBC One. The upcoming season features the return of the core ensemble cast alongside familiar faces from the past as the series continues to explore the complexities of policing in Belfast.

RMN Stars TV Desk
New Delhi | July 1, 2026

Blue Lights Series 4 Teaser and Cast Details Revealed

Fans of the critically acclaimed police drama Blue Lights have received their first glimpse of the upcoming fourth series. The BBC recently released a teaser trailer for the BAFTA and RTS award-winning show, confirming that the new episodes will arrive on BBC One and BBC iPlayer later this autumn.

The exclusive first-look clip highlights the returning Constable Shane Bradley, played by Frank Blake. In a bid to improve the crime statistics for the Blackthorn station, Bradley is seen stopping an elderly driver named David (Trevor Gill) and his passenger, Imelda (Rosamund Monteith). This brief interaction sets the stage for the grounded, high-stakes storytelling that has become a hallmark of the series.

The Wait is Nearly Over: Belfast’s finest return to the screen this autumn as Blue Lights Series 4 promises to resolve long-standing mysteries from the Blackthorn station.

A Star-Studded Ensemble Returns: Series 4 will see the return of the show’s core cast, including Siân Brooke as Grace, Martin McCann as Stevie, Katherine Devlin as Annie, and Nathan Braniff as Tommy. Frank Blake also reprises his role as Shane.

In a development that will likely intrigue long-term viewers, Richard Dormer is set to return. Dormer, who portrayed Gerry Cliff in the first series, will appear alongside Hannah McClean as Jen Robinson and Jonathan Harden as the disgraced former Inspector, Jonty. The BBC notes that this series aims to answer “important questions from the past”.

The expansive cast also includes:

Joanne Crawford as Helen McNally.
Andi Osho as Sandra.
Cathy Tyson as private members club owner Dana Morgan.
Michael Smiley as C3 intelligence officer Paul ‘Colly’ Collins.

Behind the Scenes of the Global Hit: The new series consists of six 60-minute episodes. It is co-created, written, and executive produced by the duo Declan Lawn and Adam Patterson. Production is handled by Two Cities Television and Gallagher Films, with support from Northern Ireland Screen.

A Global Phenomenon: Now sold in over 160 territories, the BAFTA-winning Blue Lights continues its gripping portrayal of frontline policing with an expanded cast and high-stakes drama.

Directorial duties for the fourth series are split, with Angela Griffin directing the first three episodes and Sam O’Mahony directing episodes four through six. Following its massive success in the UK, Blue Lights has become a global phenomenon, with BBC Studios selling the series in over 160 territories.