Cersei Lannister is in fact Jon Snow's mother? The White Walkers are actually "good"?? The opening credits features "Bran warging into the dragon"??? Oh and Michael McElhatton "is a vampire". Just some of the crazy ass yet somewhat plausible theories posed by Game of Thrones fans to people who actually star in Game of Thrones. 
Something else we've learned - Alfie Allen is NO fun.