What's the single best British detective series to start with?

Happy Valley if you want the most critically complete show of the last decade - all three seasons track a single arc and the finale is among the best series endings in British television. Broadchurch if you want a cleaner entry point: the first season is entirely standalone, eight episodes, and structurally perfect.

Is Sherlock still worth watching in 2026?

Seasons 1, 2, and 3 remain essential - tightly plotted, stylistically bold, and responsible for a genuine cultural moment in the early 2010s. Season 4 is divisive and most viewers treat it as optional. The ratio of great episodes to total runtime is better than almost any other detective series.

STREAMING · BRITISH

Best British Mysteries & Detective Shows

British television has been engineering the detective story longer than any other national tradition, and the form is in no danger of exhausting itself. From Shetland's island-fog procedurals to Sherlock's baroque puzzles to the savage social critique hidden inside a Broadchurch episode, this is the shortlist that skips the middling stuff.

Updated 8 June 2026

01Broadchurch (2013)8.6
A child's murder in a coastal village, investigated at the speed of grief - Olivia Colman and David Tennant's partnership is one of the decade's great casting coups.
SeriesStreaming on Netflix
02Sherlock (BBC) (2010)8.8
The Conan Doyle modernisation that got the balance right - Benedict Cumberbatch's Holmes is a performing anxiety before it was a cultural trope, and Series 1-3 remain outstanding.
SeriesStreaming on Netflix
03Happy Valley (2014)9.0
Sarah Lancashire as a Yorkshire police sergeant who cannot stop walking toward the worst people - three seasons of escalating brilliance, written with a novelist's eye for collateral damage.
SeriesStreaming on Netflix
04Shetland (2013)7.8
A procedural set on Scotland's northernmost inhabited islands - slow atmosphere, precise plotting, and a detective who is always the most competent person in any room.
SeriesStreaming on Netflix
05Luther (2010)8.3
Idris Elba's crumpled genius detective in a London that feels like a noir painting - Season 1 alone justifies the entire run.
SeriesStreaming on Netflix
06The Sinner (2017)7.9
An American production built entirely in the British psychological-crime tradition - less about who did it than the buried trauma that made it possible.
SeriesStreaming on Netflix
07Inside No. 9 (2014)8.5
A BBC anthology where every episode is a self-contained moral trap - the comedy-horror blend is uniquely British, and the best episodes land like an M.R. James story told fast.
SeriesStreaming on BBC iPlayer / selected episodes on Netflix

Quick Answers

What's the single best British detective series to start with?: Happy Valley if you want the most critically complete show of the last decade - all three seasons track a single arc and the finale is among the best series endings in British television. Broadchurch if you want a cleaner entry point: the first season is entirely standalone, eight episodes, and structurally perfect.
Is Sherlock still worth watching in 2026?: Seasons 1, 2, and 3 remain essential - tightly plotted, stylistically bold, and responsible for a genuine cultural moment in the early 2010s. Season 4 is divisive and most viewers treat it as optional. The ratio of great episodes to total runtime is better than almost any other detective series.

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