TVDocket
Blue Lights poster

Police drama

Where to watch Blue Lights in the U.S.

Rookie police officers in Belfast, where every call carries history.

Premieres soon BritBox Verified Editor reviewed

Artwork via TVmaze · © its respective owners

Quick answer · Season 4

Blue Lights season 4 premieres in the U.S. on Thursday, November 12, 2026 on BritBox (6 episodes).

New episodes follow weekly through December 17, 2026 (6 episodes).

U.S. premiere
November 12, 2026
Where
BritBox
Time
Not announced
Episodes
6
Finale
December 17, 2026
U.K. premiere
September 29, 2026

Full season 4 episode schedule

Where to watch Blue Lights season 4 in the U.S.

WhereHowWhenNotes
BritBox Streaming, weeklySubscription – Thursdays [1][2][7]

About Blue Lights

A police drama following response officers in Belfast as they handle routine calls, organised crime and the pressures of policing in Northern Ireland.

Season 4: Six episodes, with Richard Dormer back as Gerry Cliff and Jonathan Harden as Inspector Jonty, both from season 1. Series 4 launched in the U.K. on September 29, 2026; BritBox starts it in the U.S. on Thursday, November 12, with one episode a week through December 17.

  • Originally from: BBC One / BBC iPlayer (first aired March 27, 2023)
  • Cast: Siân Brooke (Grace Ellis), Martin McCann (Stevie Neil), Katherine Devlin (Annie Conlon), Nathan Braniff (Tommy Foster)

All seasons

Season 4

Premieres soon

Six episodes, with Richard Dormer back as Gerry Cliff and Jonathan Harden as Inspector Jonty, both from season 1. Series 4 launched in the U.K. on September 29, 2026; BritBox starts it in the U.S. on Thursday, November 12, with one episode a week through December 17.

BritBox

Season 3

Streaming

Season 3 aired in the U.K. in September 2025 and came to BritBox in the U.S. in November 2025.

BritBox

More like Blue Lights

The Red King poster

The Red King

Airing nowAcorn TV

Season 1 · New episodes now

A missing-boy cold case on an island with its own strange faith.

 Wolf poster

Wolf

Season completeAcorn TV

Season 1

DI Jack Caffery and a family held hostage in their own home.

 Slow Horses poster

Slow Horses

Season completeApple TV

Season 6

MI5's rejects, their foul-mouthed boss and the cases nobody wanted them on.

Related guides

Sources

We check each date against the sources below. If they disagree, we say so rather than picking one.

  1. Blue Lights season four premiere date set by BritBox
    Vital Thrills Publisher Checked
  2. Blue Lights season 4 returns to BritBox in November
    Telly Visions Publisher Checked
  3. Blue Lights series 4 sets September BBC premiere date
    Geektown Publisher Checked
  4. How to watch Blue Lights series 3 in the US
    Reelgood Publisher Checked
  5. BritBox first look at Blue Lights season 4
    BritBox (Threads) Official Checked
  6. Blue Lights episode and cast data
    TVmaze (CC BY-SA) Data Retrieved
  7. 'Blue Lights' promises a changing Belfast in season 4
    TV Insider Press Checked

Update history

  1. Re-checked the November 12 BritBox premiere against TV Insider (Nov. 4, 2026); unchanged.
  2. BritBox U.S. premiere set for November 12, 2026, weekly on Thursdays through December 17 (Vital Thrills, Telly Visions). Episodes 2 to 5 are projected from the weekly pattern.
  3. Hub published. U.S. date for season 4 not yet announced.

Spotted something out of date? Tell us.