Well, they could do it differently, I guess: they could have them all waving enthusiastically as Martha heads off with this strange man, delighted to have a spare bedroom now, rather than being all sad to see her go. Though that would be sort of mean, it would make the character even more sympathetic.

I think I'm just a bit freaked out that there are so many of them being cast with named actors, which means that I am wondering how many episodes they will be in. I want alien travel, dammit, and no more London for a bit!