0
Season 3 has 23 episodes
There are 23 episodes in season 3 of The Big Bang Theory.
Season 2 has 23 episodes
23 episodes.
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.