The Doctor's TARDIS

"Well, you see, it's a time machine. Well, no, it's a spaceship. Er, actually, it's a time machine and a spaceship, and on occasion a restful and welcoming home for the weary traveller... all I really ask, if you're thinking to poke about is, please, do not touch the big gleaming console right up there in the center of the platform, because no, if you turn those knobs, you will get neither hot nor cold water, in fact all you'll get are phased engines and a quantum paradox sufficient to tear about four-sevenths of the galaxy apart, capiche? Yes, I might actually be exaggerating that just a little bit, but on the other hand I might not, and do you want to see four-sevenths of the galaxy torn asunder? I thought not. Why does it look like a blue box? Well, why d'you have to find fault with everything, eh?"