First aired in 1963, Doctor who is the oldest science fiction TV drama running. It's now spanned over 800 episodes and has enjoyed high viewing figures since its reboot by BBC in 2005.
The show focuses on an eccentric extraterrestrial Time Lord who zips through time and space to solve problems and battle injustice across the universe. The Doctor travels via the TARDIS (Time and Relative Dimensions in Space), which is his old and occasionally unreliable spaceship that resembles a blue police phone box (but changes its appearance depending on its surroundings) and is much, much larger inside than outside.
Here is a range of collectibles based on Doctor Who.