No Dark Knight on iTunes?

What the heck is going on? The British version has it. They used to have it because I originally watched it by renting it. I've got a crazy hankering to watch it again, actually have a little bit of time, and I need to get some sewing done and want something I can watch at the same time. So I go looking on iTunes, and lo and behold it's gone. Why on earth would they take it off? This sucks royally because iTunes is the only way I can get American movies. I don't even have a rental place in my town. Not kidding.