Anyone watches Doctor Who?
It's a Brittish Sci-Fi Television show about a Time Lord who Calls himself "Doctor". When he introduces himself he says "I'm the Doctor" and the response is usually "Doctor who?" and that's where the name comes from, he is the doctor without a name.
The show started in 1963 and still airs, although there was a gap 1989-1996 and one 1996-2005(there was a "movie" made 1996).
The Time Lords aren't human, they are from a planet far, far away in another galaxy. The planet are called "Gallifrey", it circles around 2 suns and it's beautiful. The planet was destord though, and all the other Time Lords aswell... The Time Lords can travel in space and time, but the war the planet was destroyed in was timelocked(meaning that nothing can come in or out during the war). The Doctor was bannished before the war, so he survived. And now he is travelling around to save worlds from dangers.
He is around 900 years old, and he isn't easy to kill. He can regenerate, meaning he "canges person". Time Lords can do this 12 times according to 2 old episodes. But an episode of a side runner suggests that there's no limit.
He can also heal himself when the damages are small.
To travel in time and space, he uses a TARDIS in shape of a blue police box. The TARDIS is designed to change shape to something that fits the environment, but it's a little broken.. The Doctor, stole the thing, so he probably misused it!
TL;DR
The Doctor travels through time and space with a blue box.
He is an alien who can regenerate and heal himself.
He often have hot girls as sidekicks!!!
Blue box
All the Doctors