Why are British TV series so short? Mostly because one or two people write them, instead of a whole team, and because UK channels order one series at a time on budgets American networks would laugh at.
Six episodes is roughly what a single writer can make properly good in a year or so. That’s why Fawlty Towers only ever made 12 episodes. The original Office made 12 as well, plus two Christmas specials. The American version ran to 201. Friends managed 236.
I binge-watched the BBC’s Showtrial recently and, with only five episodes per series, felt rather bereft when it finished. It was gripping, glossy and packed with characters you loved to hate, with a storyline that kept me guessing right to the end. And that ending in series one? Let’s just say it left me with plenty to think about.
If you’ve ever finished a brilliant British drama on a Sunday night and gone looking for series two, only to find it’s three years away, this is why.
Why British TV series are short: the lone writer
Most American TV is made in a writers’ room. A showrunner leads a team who break the story together, split the scripts and keep the machine running for 20-odd episodes a year. British telly mostly works the other way. One person creates the show and very often writes every episode.
Phoebe Waller-Bridge wrote both series of Fleabag, 12 episodes in total, and then said there wouldn’t be a third. Sally Wainwright wrote all of Happy Valley. Jed Mercurio writes Line of Duty, and Steven Knight created Peaky Blinders and wrote the lot. That’s a big part of why these shows feel so personal. It’s also why there are so few. One person can only write so much, and when they stop, the show stops too.
The money: licence fee and smaller budgets
The BBC is paid for by the license fee instead of adverts, and that one pot has to cover the news, Radio 4, CBeebies and everything in between. ITV and Channel 4 do rely on adverts, but they’re selling to a UK audience roughly a fifth the size of the American one. Less money per hour means fewer hours. Simple as that.
British dramas also tend to run close to an hour an episode with almost no filler, so six of them is a serious commitment for any channel. The biggest ones are now co-funded with streamers: The Night Manager is a BBC and Prime Video production, and the Peaky Blinders sequel series is a Netflix and BBC deal. Doctor Who spent two seasons partnered with Disney+. Even with the extra money, the series have stayed at six episodes.
How UK commissioning works
American networks traditionally ordered a first batch of episodes, then picked up the “back nine” if a show did well. That’s how you ended up with 22-episode seasons.
In the UK, a channel commissions one series. If it works, it commissions another, but only when the writer’s ready and the cast is free.
British actors bounce between TV, film and theatre, so a hit can wait years for everyone to line up again. Channels hedge their bets too. Six episodes is a far smaller risk than a 22-episode order, and if a show flops, it’s quietly forgotten by spring. Sometimes the wait is deliberate.
Sally Wainwright left seven years between the second and third series of Happy Valley so Rhys Connah, who plays Ryan (opens in new tab), would be old enough for the story she wanted to tell. The Night Manager took nearly ten years to come back.
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These are my picks for the shows that knew when to stop. The Office. Two series, two Christmas specials, and the story was done. It’s still the example everyone points to.
Happy Valley had three series across nine years, and Wainwright told Variety in 2023 (opens in new tab): “We’re very definitely not coming back.” So far, she hasn’t.
The Night Manager’s 2016 series felt complete. Line of Duty’s 2021 finale felt like a full stop, even if plenty of people hated who “H” turned out to be. And Peaky Blinders wrapped up after six series and 36 episodes. Here’s the funny part. Three of those five are back. The Night Manager returned on New Year’s Day 2026, and a third series was commissioned at the same time as the second. The BBC has confirmed a six-episode seventh series of Line of Duty, filming in Belfast this year. Peaky Blinders came back as a Netflix film, The Immortal Man (opens in new tab), in March, and a two-season sequel set in 1953 Birmingham and starring Charlie Heaton and Jamie Bell is on the way.
So British TV doesn’t always end when it ends. Sometimes it just goes very quiet for a long time.
The ones I wanted more of
Amandaland gets six half-hour episodes a series, which is gone in an evening. Lucy Punch’s Amanda is one of the best comic creations on telly right now, and three hours a year isn’t enough of her. At least a third series was announced in May.
Strike has done six stories since 2017, none longer than four episodes, for books the size of doorstops. The Running Grave is expected in December, and at five episodes it will be the longest yet.
Black Mirror started on Channel 4 with three episodes a series and still arrives in small batches on Netflix. Season 8 is being made now. (Need a catch-up? Here’s our guide to Black Mirror season 7 and the best episodes to watch.)
Slow Horses is one of the few British-made dramas (opens in new tab) that turns up every year, with Gary Oldman’s Jackson Lamb as grubby and rude as ever. Season 6 is on Apple TV now, weekly until 21 October. Still only six episodes, though which is just not enough in my opinion.
Luther got 20 episodes over five series, then a film. Idris Elba deserved a longer run. And Sherlock? Thirteen episodes across seven years, counting the Victorian special. It feels like a much bigger show than it actually was.
And the ones that went on too long
Short isn’t the whole story. Broadchurch only made 24 episodes, but series one solved the murder, and everything after felt like a different show in the same seaside town. The Crown ran to 60 episodes over six seasons, and by the end it was dramatising news most of us remember watching live.
Downton Abbey had 52 episodes, then three films, the last one literally called The Grand Finale. It said goodbye more than once.
Killing Eve was the sharpest thing on telly in 2018. By the 2022 finale, a lot of its own fans had fallen out with it.
Then there’s Doctor Who. It’s been on and off since 1963, so “too long” is sort of the point. Disney+ has left the partnership, and the BBC has ordered a 2026 Christmas special written by Russell T Davies.
Is shorter actually better
American TV has quietly moved towards the British model. Plenty of streaming seasons now run to eight or ten episodes, and the 22-episode network season is rarer than it used to be. Six episodes isn’t a quirk any more.
The gap is still very British, though. Two years between Strike stories, seven between the last two series of Happy Valley, nearly ten for The Night Manager. You finish on a Sunday night, and then you wait for years.
There are also a few British series I still think deserved more time. Crazyhead was gloriously bonkers, mixing horror, comedy and friendship in a way that felt completely its own, and I would happily have watched another series of Amy and Raquel battling demons. Hard Sun had that deliciously dark, apocalyptic premise, with enough unanswered questions and tension to make its single series feel like the beginning rather than the end.
Then there’s Criminal: UK, which proved that you don’t need car chases, elaborate sets or endless episodes to make compelling television. The interrogation-room format was tense, claustrophobic and brilliantly acted, and I could have happily sat through many more cases. And RELLIK was one of those wonderfully ambitious dramas that demanded your attention, telling its murder story backwards and making you constantly rethink what you thought you knew.
Perhaps that’s the real frustration with short British series. Six episodes can be enough to tell a brilliant story, but sometimes they are only just enough to make you want six more.
