Someone on facebook wrote:
I read that Jessica Lange let a little out about her character, she's a nun that works at the asylum. She became a nun late in life, was a lounge singer/dancer before. The asylum was a hospital for, I think, TB patients after that it turned into a hospital for the criminal insane. So you can get a few ideas from clue1, I think, knowing a little about it.
We really know very little about this season, they weren't even at COmic-Con :( I am excited about the casting.