When will the show reveal Jon Snow's father?
This was one of the most frustrating parts of the finale. While we learned for certain that Jon Snow is not Ned Stark's bastard — he's the son of Ned Stark's sister Lyanna — show watchers were still uncertain about the identity of his father.
Tuesday evening, HBO finally confirmed a long-standing fan theory (R+L=J, which you can read about here) which says Jon's the son of Lyanna and Rhaegar Targaryen.
While an exciting development, it's a mystery when this will be revealed on the show.