Bobby Cannavale has joined Showtime’s dark comedy series Nurse Jackie. He will appear in all 10 episodes of the show’s upcoming fourth season playing a formidable hospital administrator sent by the new conglomerate that buys the financially beleaguered All Saint’s Hospital to improve efficiency and profitability, but his arrival is sure to shake things up. Production on Season 4 begins in September in New York for a 2012 premiere. Cannavale won an Emmy for his guest-starring turn as Will’s boyfriend on NBC’s Will & Grace.