The show will air through May 2019, its 12th season. It won't be known for awhile if it'll be renewed for a 13th season. It remains the most watched TV show [for the 2016-2017 season] after sports programming, so if the cast wants to continue there's no reason to believe it won't be renewed again.
The eleventh season began in September 2017 & it will return for a twelfth season in September 2018. If it gets renewed after that is unknown & probably won't be announced until CBS' upfronts in March 2019.
23 episodes.
There are nearly 18 million US viewers of Big Bang Theory episodes.
There are 23 episodes in season 3 of The Big Bang Theory.
About ten.
Season 2 has 23 episodes
Season 3 has 23 episodes
She missed a few episodes after breaking her leg.
As of 2012, Yes they are. It's a big hit.
There are 5 seasons with 111 episodes total.
CBS is the only network that has aired original episodes of "The Big Bang Theory". It started on Monday nights, but currently is on Thursdays.
Season 12's start date has not been set [as of April 2018] but presumably it will begin on September 17th or 24th 2018.