Sam
I used to travel with this really interesting guy. Saw some amazing things and had to do a lot of running.
Rock salt, got it. What's the deal with that black smoke then?
Well back home there is. Aliens have been coming to Earth for decades and always trying to destroy everything. And as much as there's the Doctor, he wasn't always around so we had to learn to fend for ourselves. There's UNIT and Torchwood. (who like to think they outrank us, but we have the better guns) All working in secret to protect the public. If demons are a big deal here, how come your governments don't have the same sort of thing?