The ending of It: Welcome to Derry revealed a crucial detail that changes how fans should actually watch the movie franchise and the TV series. Well, here's a guide on the right order to watch the horrific events in Derry and how Pennywise made THAT ending possible.
WARNING: This article contains MAJOR SPOILERS for both IT movies and IT: Welcome to Derry, so proceed with caution.
The Best Way to Watch IT and Welcome to Derry in Order
There are two ways to watch the franchise: by release date or by its timeline.
If it's by release date, then by all means, watch the first IT movie, which was released in 2017, then let IT: Chapter Two, which premiered in 2019, follow suit. The IT: Welcome to Derry series made its debut just this year, which is why it should be watched last.
While the first IT movies introduced the world of Derry and the horror that Pennywise instilled in town, it's not the right order if we're basing it on timelines.
IT: Welcome to Derry served as a prequel series to the movies, as it is set in 1962, while the 2017 film was set in 1989, followed by Chapter Two, which was set 27 years later. However, the first season finale's revelation about Pennywise spiced things up for the rewatch.
The entire series, excluding the finale, is considered the prequel, but the big twist is that Pennywise can bend time according to his will, and as the finale unfolded, the last aired episode is perceived to be a sequel in the eyes of the villainous clown. Here's how the notorious cosmic being made that possible.
Can Pennywise Really Travel Through Time? How He Connected the Movies and Series

The Losers Club technically killed Pennywise in 2016, meaning that he does not exist beyond that year. However, take into account the powers he possesses, and that is his perception of time, which grants him the ability to exist all across time before he was ever executed.
It explains why he would have to go through all the trouble of traveling back in time and kill Marge and Richie Tozier's ancestors to make sure they have never been born in the first place. Should he achieve victory, then the erasure of the ancestors from existence would eradicate the time that led to his defeat in 2016.
The horror clown could potentially succeed in the near future, should an IT: Welcome to Derry season 2 ever happen.
Despite the loopholes of adding time travel to the cosmic being's ever-growing roster of powers, the only way that they could defeat Pennywise is by destroying him at his source, perhaps somehow trapping him in some form of time capsule that would forbid him from perceiving or altering time, however and whenever he wishes.
For now, fans can watch IT: Welcome to Derry on HBO Max and Hulu.
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