It was originally just supposed to be one episode. We had thirteen episodes for the season and in trying to wrap up all the storylines and all the mythology, we developed the story — and the story was huge and the outline was huge and we realized it is not one episode of television. So, in order to do everything justice that we wanted to do – including all the character moments that we wanted to have – so, fortunately, our network partners said “have fun with another episode.” So, we did….There was so much story to tell and so much to wrap up and we really wanted to wrap up the characters’ journeys over the season and to try to squeeze that into one episode, we couldn’t have done it justice.