COLEMAN: Peter has a system for driving the TARDIS. I like to press things, and Peter looks very disapprovingly at me. CAPALDI: I say, “Get your hand off of that! That’s not what that one does!” I thought it was important to have a logic to the switches, so I worked out a rough geography of what each one does. The thing about the TARDIS is that it has a telepathic and organic quality about it as well as a mechanical one. COLMAN: Sure, like a Prius. CAPALDI: Exactly.