Entertainment Weekly is reporting that Marcia Gay Harden will be joining the cast of HBO's "The Newsroom." Harden will be playing the role of a litigator who is defending the news network in a wrongful termination suit. She is replacing Rosemaire DeWitt, who left the show due to scheduling conflicts. The scenes which DeWitt already shot will be refilmed with Harden in the role. "The Newsroom" will be back on HBO this summer.