Here's some of the 21st century UK shows I've been watching from the last few years and the number of episodes in their most recent season. I've left out shows that are one and done. I also haven't checked which are BBC and which are ITV or if any are streaming exclusives, but I think they're still valid data points for UK TV in 2026.
Shetland: 6
Ludwig: 6
Bookish (Mark Gatiss's new series): 6
Karen Pirie: 3
Lynley: 4
Vigil: 6
No Offence: 6
Crime: 6
Endeavour: 3
Grace: 4
Sherwood: 6
Annika: 6
That's a mix of shows with hourlong episodes and shows with 90minute episodes, with more of the former, I think. Also mostly cop shows, but if there are any recent SF shows on UK TV with multiple seasons in the last few years that aren't Doctor Who, I guess I haven't seen them or forgot about them.
The thing about cop shows compared to Doctor Who is that they don't have to build a new world every week or do lots of special visual effects, makeup, prosthetics, or costumes. Some of them have more regulars than Doctor Who, but in general, it seems unlikely that many of these would be more expensive or challenging to produce than Doctor Who. And yet they aren't getting 10 episodes a year.
6 is the new 12, which long ago was the new 24.
Or thereabouts.
The problem is audience retention, especially amongst the younger end of the audience.
Adult shows even historically can have years between seasons, and it kind of works out — time genuinely feels shorter as you get older. As a point of reference, Summer lasted forever when we were kids right? Even into our twenties? Christmas too… but now? It’s over as soon as it begins. Relative I guess.
But back to TV and two years for a ten year old — Who’s original bread and butter audience, or a part of it at least — is literally a *fifth of their entire life to that point*and they are going to move on to other things when there’s no blue box on the telly.
It could even be argued that that is part of what did for its popularity in the eighties too — shorter seasons, the hiatus, kids getting invested in the non-serial adventure series on the other side that could often be repeated and you almost wouldn’t notice you’d seen it already when you are small.
Top Gear had the audience it did because twice a year the chaps were being silly and the Stig was being cool. Away just long enough for the smaller ones in the audience to start missing them, or be busy on holidays and what have you, then back on the telly box to do new things.
Now? Well, there’s the repeat channels, so nothing is *really* gone, but new things are rarer and rarer, whether thats new episodes of a thing thats loved, or genuinely new things in general. Especially on Broadcast Telly.
Granted, it’s all just the shape of modern telly, and modern telly finances (and 4k UHD is still the exception rather than the rule on broadcast) but Who hasn’t found its way yet.
But when you look at the success of things like Slow Horses (which admittedly is not a family show) it’s clear the old model still has a place. It’s just… gone somewhere else.