# BBC Blue Lights fourth series release

> Live situation record from CLSTR: https://clstr.news/situations/bbc-blue-lights-fourth-series-release
> Updated: 2026-09-29T08:00:00.000Z. Sources: 9. Developments: 2.

The BBC One police drama ‘Blue Lights’ has returned for its fourth season. The upcoming six-part series follows Constables Grace Ellis, Tommy Foster, and Annie Conlon as they navigate increasing threats in Belfast.

Plotlines involve a murder trial concerning Gerry Cliff that uncovers long-buried secrets affecting the police force and the criminal underworld. The season also explores themes such as a migrant resource centre, anti-immigrant protests, police funding cuts, and the impact of social media on public safety, including personal safety concerns for Grace after her details are exposed online.

## Timeline

### 2026-09-29: Blue Lights returns for fourth season on BBC One

The BBC police drama ‘Blue Lights’ returns for season 4, featuring intense storylines set in Belfast involving migration, social media, and police procedural challenges.

6 sources. https://clstr.news/cluster/blue-lights-returns-for-fourth-season-on-bbc-one

### 2026-09-15: Blue Lights returns for fourth series on BBC One

BBC One has confirmed the return of the award-winning Belfast police drama ‘Blue Lights’ for a fourth series, featuring returning cast members and a plot involving a high-stakes murder trial.

3 sources. https://clstr.news/cluster/blue-lights-returns-for-fourth-series-on-bbc-one

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Cite as: BBC Blue Lights fourth series release. CLSTR, https://clstr.news/situations/bbc-blue-lights-fourth-series-release