NBC-logo-RGB-pos2The NBC series Parenthood was supposed to debut this fall before the actress fell ill. Then the show was put on the midseason schedule. Now Maura Tierney has pulled out and the role will be recast. But I hear that Mercy, which was moved up when Parenthood was pushed back, is in trouble. The testing has been disappointing, and my sources have seen the documents to that effect. Gail Berman is complaining about NBC (bigwigs not supportive of the show), and NBC is complaining about her (she still thinks she’s running a network).