Halfway through season 4 I am once again am fixated on one thought. Namely, that the continued adventures on Earth or with humans are getting a bit boring. I mean, thus far every time something really drastic has happened to Earth it has either been covered up by the government or undone completely. It's easy to see that the show has limits to the extent that it's willing to change modern Britain, and of course the history of Earth can't be messed with either. All of which adds up to a certain lack of dramatic tension. Some alien worlds that don't require the same narrative protections would nice. Also cool alien costumes. I can has pleez?