The series creator revealed that he and his writers were not making up the plot of the FX series as the show went along, insisting that he always knew the direction he wanted the show to take.
"The only thing really frustrating for me, to be honest with you, is that sometimes people would write this idea that we were making it up as we went along," Murphy told Entertainment Weekly.
"I wanted to say, 'Really?' But I think now people are writing and saying, 'Oh yeah!' I'm excited for people to see it on DVD, because now that they know how it ended, [they can] go back and see all of the little things, like people who have no reflections in mirrors," he added. "When you go back, you will see everything was set up."
Murphy went on to speak about Vivien's (Connie Britton) death, saying that she was the only character to have died in peace.
"Unlike most of the people in the house, in fact maybe the only one, she died surrounded by love," he said. "So I think that made her a little more at peace - accepting, not fighting. She sorta died at peace in some weird way. I was really excited that in the afterlife they have such great blow-dryers."
Earlier this month, Murphy joked that he is taking Rubber Man to the Golden Globes as his date, adding that his boyfriend was very upset by the news.
American Horror Story received two Golden Globe nominations - one for 'Best Drama Series' and one for 'Best Supporting Actress' for star Jessica Lange.