From J.J. Abrams based on the Stephen King novel <iframe width="560" height="315" src="https://www.youtube.com/embed/NXUx__qQGew" frameborder="0" allowfullscreen></iframe>
Typical Stephen King garbage. 'Stephen-King-influenced-by-utter-shitty-lets-go-off-on-whatever-tangent-we-like-nonsense-of-LOST' So, Jake Epping (played by James Franco) saves John F Kennedy...but this has so many fucking holes in it, it's untrue. Example: after altering the events of November 22nd, he learns that on November 25, a massive earthquake in Los Angeles has killed thousands. Jake realizes that it is a direct result of his actions. How? Fucking why? :dunno: :: Ridiculous book, ridiculous series.
I remember an episode of the rebooted The Twilight Zone tv series from the 80s that had exactly the same plot: Time Traveler saves JFK, but his survival leads to World War III, so he will need to fix this by him killing JFK instead before all this happens.