When it comes to the most well-known British imports, nothing beats Doctor Who. Currently holding the title of the longest-running sci-fi television show in the world, the series originally premiered on BBC in 1963, where it ran until 1989 before it was taken off the air. Then, in 2005, it was retooled by Russell T. Davies. Since then, Doctor Who has been a huge success for the network, across the entire world—so much so that, even after seven years back on the air, it's still besting ratings records set by, that's right, Doctor Who itself.

Not many shows can maintain the ability to inspire an emotional catharsis in its viewers while presenting ridiculous-looking foes like evil snowmen, weeping angel statues, and aliens that roll around in metal tanks, but Doctor Who seems to do it effortlessly.

Plus, when you think about it, it’s a genius concept. Here’s a main character who can never really die, living in a time machine that allows him to travel between planets, universes, and realities. Actors may age as time goes on, but the show’s got a solution for that: The Doctor regenerates into a new body every few years, allowing the series to shuffle around actors after a couple of seasons.

Writers can never really run out of ideas thanks to the endless amount of realities they can send The Doctor to, so literally any plot can be presented with minimal explanation necessary. Doctor Who truly is the epitome of a fantasy/sci-fi series that takes you completely out of the real world. It also doesn't hurt that The Doctor always travels with a young, hot, female companion in tow.