Broadcast drama used to run twenty-two episodes a season. Cable moved to thirteen. Streaming settled on eight, sometimes six, and that number has become close to a default.
It's a strange length. It's too short to develop anything at a natural pace and too long for the amount of story most of these shows actually have. The consequences show up constantly and once you notice them you can't stop.
Where the number came from
Not from storytelling. Eight episodes at roughly an hour is a length that can be produced for a manageable budget, released in one drop, consumed over a weekend, and renewed or cancelled quickly.
It also suits high-profile talent. An eight-episode commitment is something a film actor will do; a twenty-two-episode one, generally, is not. As television budgets rose and casting ambitions rose with them, short seasons became necessary.
None of those reasons has anything to do with what a story needs.
The saggy middle
The most visible symptom. A great many eight-episode seasons have a strong first two episodes, a compelling final two, and three or four in the middle where very little happens.
The reason is structural. A show conceived as a film-length story stretched across eight hours has to fill the gap. What fills it is usually backstory episodes, subplots that go nowhere, and characters travelling from one place to another at length.
The old twenty-two-episode model handled this differently. It had episodic stories — a case, a problem, a self-contained hour — layered under a season arc. That structure gave every episode a reason to exist. Remove the episodic layer and keep the length and you get filler.
Nobody has time to become a character
The other cost, and the one I think does more damage.
Attachment to television characters is built through accumulated time. You come to like somebody because you've watched them do ordinary things for thirty hours. That's the medium's specific advantage over film, and it's what makes a death in a long-running series land in a way a film death rarely does.
Eight hours is not enough for that. There's time for plot function and a defining trait, and not much else. Which is why so many recent dramas have technically excellent writing and characters you struggle to remember three months later.
Supporting characters suffer worst. In a long season, a minor character gets episodes where they're the focus and becomes a person. In eight episodes they get four scenes and remain a job title.
The cliffhanger problem
A specifically modern failure. Because renewal decisions come after release, writers face a choice: end the season with resolution, or end on a hook that pays off in a second season that may never be commissioned.
Many choose the hook, and a substantial number of shows have been cancelled immediately afterwards, leaving stories permanently unresolved.
This has become common enough that audiences have adapted. Plenty of people now wait for a second-season renewal before starting a show at all — which is a rational response that makes cancellation more likely, since first-season viewing figures determine renewal. A self-reinforcing loop that damages everybody.
What works at this length
To be fair, some things suit it very well.
Limited series with a defined ending. A story that's genuinely eight hours long, told in eight hours, with no expectation of continuation. This format has produced some of the best television of the last decade and the constraint is a feature.
Adaptations of single novels, for the same reason.
And anthologies, where each season is self-contained and the short length forces discipline.
What doesn't suit it is the ongoing character drama, which is precisely the form television is best at and which the current economics discourage.
The release pattern makes it worse
One more factor. A season dropped all at once and watched in three days occupies a different place in your life than one watched weekly over two months.
Weekly release creates a gap in which you think about the show, discuss it, form theories. That gap is where a lot of the attachment forms. Compress it and the show is consumed and forgotten within a week.
Several services have moved back towards weekly release for their flagship titles, and the observable effect on how long a show stays in conversation is considerable. It's one of the few recent industry decisions I'd call straightforwardly correct.
What I'd want
More variety in length, chosen per show. Twelve or fourteen episodes for character dramas, six for tight thrillers, whatever the story needs.
And a return of the episode as a unit with its own shape. The best television has always had episodes you can remember individually, and that's very hard to achieve when a season is written as one long document and cut into eight.
The economics point the other way, so I'm not optimistic. But the fact that the most acclaimed shows of any given year are disproportionately the ones that ignore the default suggests it isn't a settled question.