Source: http://the-big-bang-theory.com/
CBS has announced their fall premiere dates, with The Big Bang Theory set to return for its 3rd season on Monday, September 21st, in its new 9:30 slot.
CBS’s new season rollout officially begins on Monday, Sept. 21 with HOW I MET YOUR MOTHER (8:00-8:30 PM, ET/PT), the premiere of the new comedy ACCIDENTALLY ON PURPOSE (8:30-9:00 PM, ET/PT), the seventh season premiere of television’s Number One comedy TWO AND A HALF MEN (9:00-9:30 PM, ET/PT), the third season premiere of THE BIG BANG THEORY in its new time period (9:30-10:00 PM, ET/PT) and the eighth season premiere of CSI: MIAMI (10:00-11:00 PM, ET/PT).