You know what most time travel scenarios seem to involve? Going back in time and killing Hitler. Someone always posits the whole “kill Hitler” thing. That’s how I know there’s no such thing as time travel: Hitler didn’t die before he caused any problems.
But then there’s the life saved, like John F. Kennedy. Stephen King wrote a book on a guy who time travels back to save Kennedy, and Hulu has a mini-series for the adaptation of that book coming in February. Teaser after the cut.
At some point every geek franchise goes for time travel. Superman circles the globe at high speeds to make sure he can be in two places at once. Captain Kirk needs to find some humpback whales. I dream of dumping Barney back in the paleolithic age where he belongs. Time travel is what every geek has considered at some point.