Deadline
http://www.deadline.com/2012/05/james-cromwell-joins-fxs-american-horror-story-for-season-two/
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As we’ve already learned, the new season will be set in an East Coast institution for the criminally insane run by Jessica Lange’s character. Per Deadline, Cromwell would play the sought-after role of Dr. Arden, who works at the institution and goes head-to-head with his boss (i.e., Lange). He is the third big-name addition to “AHS” for next season along with fellow Oscar nominee Chloe Sevigny and Maroon 5 singer Adam Levine. They’re joined by French actress Lizzie Brocheré and four other actors from Season 1 who, like Lange, will be playing new characters: Zachary Quinto, Sarah Paulson, Evan Peters, and Lily Rabe.
Look for more soon!