E! Online (blog)'Big Bang Theory' scores a three-year pickupEntertainment WeeklyImage Credit: CBSExcellent news for fans of Sheldon, Leonard, Penny, Howard and Raj: CBS has renewed its top-rated The Big Bang Theory for an additional three years, extending its run through the 2013-14 season. ...CBS renews 'The Big Bang Theory'USA TodayCBS renews 'Big Bang Theory' for three more seasonsHitFixBig Bang Theory Gets Renewed for Three YearsNew York MagazineE!