The Big Bang Theory returns on Monday. Allow us to jog your memory before Season 9 kicks off on Monday, Sept. 21 at 8/7c. Learn More. Like; Tweet; The Big Bang Theory is kicking off Season 9 with a wedding and a divorce of sorts. The Big Bang Theory Season 8 ended with a shocking breakup and a threat to Leonard and Penny's engagement. After eight seasons of anticipation, Penny and Leonard are finally getting married on “The Big Bang Theory.” CBS released a sneak peek of Monday’s. The ninth season of the American sitcom The Big Bang Theory will start airing on CBS on Monday, September 21, 2015. It will return to its regular Thursday time slot. NEW YORK(CBSNewYork) — ‘The Big Bang Theory’ returns to CBS on Monday night. On Sunday, CBS2’s Jill Nicolini went behind the scenes with one of the. The ninth season of The Big Bang Theory was confirmed on May 12, 2014, alongside seasons 8 and. Amazon.com. The delightful sitcom The Big Bang Theory revolves around a character type rarely seen on television: The alpha geek. Physicists Leonard (Johnny Galecki. Big Bang Theory Season 9: Our Hopes for 'Shamy,' Li'l Wolowitz and More 18 hours ago | TVLine.com. Thursday TV Ratings: Rookie Blue, Boom!. 902 'The Separation Oscillation' Pictures September 13, 2015. We have added pictures from the second episode of The Big Bang Theory's upcoming ninth season, The.