A plug: For those unfamiliar with the show, the basic premise is that a human-looking alien calling himself The Doctor, an alien from an advanced society, stole a time and space machine from his people and travels the universe and history righting wrongs and saving innocents. His time/space machine used to be able to automatically blend in wherever and whenever it landed, but that particular circuit is broken and it's stuck in the shape of a 1960's British Police Telephone Box. The ship is, famously, bigger on the inside and is called the TARDIS. If you are willing to invest two hours of your time in some really quality television, go and find these two episodes: "Blink" starring David Tennant (the Royal Shakespeare Company's "Hamlet." by the way) as the 10th Doctor, and "Vincent" starring Matt Smith as the 11th Doctor. They are self-contained, and brilliant.
For those a bit more familiar with the show, let me share this quote from current show runner Steven Moffat: "It's hard to talk about the importance of an imaginary hero [like the Doctor.] But heroes are important. Heroes tell us something about ourselves. History books tell us who we used to be, documentaries tell us who we are now, but heroes tell us who we want to be. And a lot of our heroes depress me. But you know, when they made this particular hero, they didn't give him a gun. They gave him a screwdriver to fix things. They didn't give him a tank or a warship or an X-Wing fighter, they gave him a call box from which you can call for help. And they didn't give him a superpower or pointy ears or a heat ray. They gave him an extra heart. They gave him two hearts. And that's an extraordinary thing. There will never come a time when we don't need a hero like the Doctor."
That, in a nutshell, is why I love the show, and why I could not travel all the way to the UK without visiting Cardiff.