AOLTV: But you know, these longer arced things, you have an idea for where they're going.
Steven Moffat: If you actually look at the number of minutes we devote to an arc plot, compared to our story of the week, it's heavily weighted in favor of the story of the week. In fact, the biggest counter to that would be the opening two-parter [for season 6], because there's a lot of arc stuff in that. But even with that, if that's all you ever saw, you know, there's a whole alien invasion, there's a new monster, and [much of the story is] resolved. But it varies. Sometimes you think, "That'd be a cool villain to turn up." Sometimes you just think, "I want to do pirates."