An American Werewolf in London
No official plot yet, but the original told the story of a couple American tourists, who are attacked by a local werewolf in a small English town, where one of them survives only to become a werewolf...
An American Werewolf in London (1981)
Good story; good humor; sweet gore; werewolf running amok in the crowded streets of London; what more could you want? Definitely worth a check if you haven't seen it already.