As to the Clara business, Gaiman told us: “I love the idea of a TARDIS who doesn’t particularly like a Companion, just in the same way that there were Companions…Leela springs to mind, the old Tom Baker Companion after whom the character on Futurama was named, who the TARDIS really liked. It was always sort of part of the script, for reasons never adequately explained, the TARDIS liked Leela a lot. So if she doesn’t like Clara [pause] that’s something that may or may not ever be explained, it may get deeper, it may not. But I like that. I like the fact that the TARDIS is a character.