How many seasons does How I Met Your Mother have?

How to get close to this number

Another network sitcom, another run in the high single digits. These shows continue while the ratings hold and the cast stays, and nine years is a typical span for a successful one — the same band as the other sitcoms on this site.

The framing device in the explanation is what made the length a structural problem. The whole series is a father telling his children how he met their mother, which promises a specific ending from the first episode and defers it for nearly a decade. A show that runs on a withheld answer has to eventually deliver it, and the longer it runs the heavier the promise gets.

That is why the finale is remembered as divisive. A premise that generates nine years of narrative tension creates an expectation no ending can fully satisfy, and the writers had planned their conclusion years earlier when the show was expected to be shorter. Long-running series frequently end on decisions made for a version of the show that no longer exists.