I think he quit Hannibal because of heavy makeup sessions that they've had to do on his face for season 3,
New actor that replaced him in makeup,
Have to say oldman was great as Manson
That would have to be annoying to do for so long especially for a tv show that is more than 12 episode seasons. Another thing about Pitt and Boardwalk, I remember he was really popular and many thought he would take off after. So, far the only person who is taking off is Jack Huston (Ben Hurr remake and now the Crow).
