How to Watch Blue Lights Season 4 on BritBox
Blue Lights Season 4 is coming to BritBox in the United States, but BritBox has not published a U.S. premiere date in its official media release. The new season has six episodes. Seasons 1–3 are available on BritBox now.
What is confirmed
| Detail | Confirmed information |
|---|---|
| U.S. service | BritBox |
| Episodes | Six |
| U.S. premiere date | Not announced by BritBox |
| Earlier seasons | Seasons 1–3 available now |
Season 4 story
Three years into their work as response officers, Grace Ellis, Tommy Foster and Annie Conlon face a new threat on Belfast's streets. The murder trial of Gerry Cliff exposes a long-buried secret that affects both the police and the criminal underworld.
Returning cast and creators
BritBox confirms the return of Richard Dormer, Hannah McClean and Jonathan Harden. Declan Lawn and Adam Patterson wrote and executive produced the season. Angela Griffin directed episodes 1–3, while Sam O'Mahoney directed episodes 4–6.
How to watch
Use the BritBox app or website in the United States. We will update this page when BritBox publishes a U.S. premiere date.
Frequently asked questions
When does Blue Lights Season 4 premiere in the U.S.?
BritBox has not announced the U.S. premiere date in its official release.
How many episodes are in Season 4?
BritBox identifies it as a six-episode season.
Where can I watch the earlier seasons?
Seasons 1–3 are available on BritBox in the United States.
Questions about DIRECTV? Call 1-855-690-9884.
Details reviewed October 22, 2026 from the primary sources recorded with this release. Availability and schedules can change.