1: The 5th doctor is the father in law to the 10th doctor

2: According to the Eighth person to play Doctor Who said that the Doctor is half Human and gets it from his mother's side.

3:In a novel published in 1998,It stated that the 6th Doctor attend a world premiere of Star Wars in 1977

4:TARDIS is an Acronym
Time
And
Relative
Dimension
In
Space

5: Orginally Doctor Who was supposed to be educational and for kids because it would teach them science,but BBC scrapped the idea.

6: The doctor is from an alien race that call themselves Time lords,from the planet "Gallifrey"

7: The doctors name has never been revealed and it's a mystery still to viewers and most characters.

8: Amy and Amelia Pond in doctor who are played by cousins in real life

9: Doctor Who takes place in many different places but here are the percentages for how much of the show takes place in that location:

Earth:46%
Alien World:33%
Space Craft/Stations:16%
Other Realms:4%

10: The TARDIS was supposed to change form each episode but was found "Too confusing and hard to pull off" when it was introduced