Showtime has renewed its summer drama block: Masters of Sex and Ray Donovan are both coming back for third rounds. The will start production early next year on 12 episodes each. “Both Ray Donovan and Masters of Sex are quintessentially Showtime: bold, provocative, premium television with production values at the top of the food chain,” said Showtime president David Nevins. “These acclaimed shows are filled with complex and interesting characters and settings that will no doubt give audiences compelling television to invest in for seasons to come.”