Time travel is my favorite Sci-fi. There’s just not anything out there that does it well. I’ve never watched Dr. Who, but I’ve seen whole conventions devoted, dedicated to that one show, Quantum Leap and Back to the Future are uninteresting, boring, and too mundane.
I recomend that you do check out some of Doctor Who, there is a lot of great stories in it, well up until Jode era, when the quailty nosedives majorly, anyway:
Here is three videos that might give you a bit of a insight into Doctor Who:
First off, one of the best speeches in the show that shows the depth of the character that is the Doctor:
This one is a mix of footage that kind of covers the central plot of the modern revival series
A scene from the classic series when Tom Baker was the Doctor, where the show questions the choice of Genoside and effects upon history:
On the subject of War, in anime, there is two series that I can think of, that does war on a galatic scale:
First off, is Legend of Galatic Heroes, a story that tells things from both sides of the confict, no super robots, just space battle ships and miltray smarts: combined with political stuff going on
The other is Armoured Fleet Dairugger XV, better known in the west as Vehicle Voltron, I know the Lion Voltron AKA Go Lion Go, was more sucessful and popluar but its confict wasn't really a full blown space war, sure some battles took place on other planets but for much of the series it was pretty much just the lions taking on the forces of King Zarkion and Prince Lotor, while with Vehicle Voltron, it starts out as explorers, roaming the comsos in serach of new worlds to live on, before it esculates into a full blown space war and despite having a powerful robot at their disposal, it takes far more ships to destory the enemy forces in the end and the stakes get higher, of course, one of the enemy forces actually has a good character arc that plays out across the series, which makes him more intersting than Lotor or Zarkon in my eyes, of course, the war playing out across the galaxy has consquences or rather, the ones doing the attacking, they actually attack Earth and do serious damage thou its not Voltron that drives them off but allies of Earth, thou its what drives the aliens that makes the show more intersting, I think the reasons it didn't quite connect with kids is, the size of the cast of characters and the fact the story is actually more adult focused where things aren't Black & White, in Go Lion, Lotor & Zarkon don't go through much of a character arc and until the end, they are pretty much evil, through and through, while Hazar is far more complex of a character