I can't believe that there's virtually no discussion here at The Technodrome about The Big Bang Theory. Anyway, it looks like the show is coming to an end with the forthcoming 12th season:
https://www.eonline.com/news/962252/...fter-season-12.
If it were up to me, I would've had the show come to and end after the 7th season, before they signed a three year extension. At that point, the show was past it's prime, and didn't really need to continue. There is no way in shell that the show should been given an addition extension for seasons 11-12.