10 Things About Doctor Who That Seem To Confuse Non-Fans

9. The TARDIS

So you've established that the Doctor is a time traveller and every time traveller needs something to time travel in so why is the concept of the TARDIS still so difficult for some people to grasp? Yes it looks like a mid-20th century blue box and yes it's bigger on the inside, but both of these issues have been explained in the series if you'd actually care to do your research.

It looks like a police box because its disguise mechanism - the chameleon circuit - broke whilst the Doctor was trying to fit in on present-day Earth (when the series started in the 1960s was present-day Earth) and it's bigger on the inside because you're literally entering another dimension when you step through its doors - one in which size, along with time and space, is transcendental. It's not rocket science, although it is basic dimensional engineering.

It's like when a larger cube looks like it could fit inside a smaller cube when the larger one is further away, only it is isn't really like that at all so forget that analogy completely. Why doesn't the Doctor just fix the chameleon circuit, you ask? Because he likes it the way it is. Simple as. There are bigger fish to fry in terms of getting non-fans to actually understand the basic conventions of the series, anyway, such as...