How Many Series Of The Big Bang Theory Are There | Legit • Checklist |

The Big Bang Theory (often abbreviated TBBT) is one of the most successful sitcoms of the 21st century. Created by Chuck Lorre and Bill Prady, it premiered on CBS in 2007 and ran for 12 seasons (known as "series" in UK/Commonwealth English) before concluding in 2019.

If you’re asking about (the term used outside North America for a full season’s worth of episodes), the direct answer is: how many series of the big bang theory are there

If someone tells you there are 13 series, they are either confusing a spin-off, counting the failed pilot, or referring to a regional broadcast split. The definitive, creator-approved answer is: The Big Bang Theory (often abbreviated TBBT) is

Series 1, Episode 1 (“Pilot”). But many fans skip Series 1 due to rough audio and different characterizations (Sheldon is meaner, Penny less warm). All countries aired 12 seasons

No. All countries aired 12 seasons. However, some countries (e.g., Japan, Germany) split a single US season into two shorter “series” for broadcast. But on streaming and DVD, it’s always 12. Final Summary | Question | Answer | |----------|--------| | How many series of The Big Bang Theory ? | 12 | | Total episodes | 279 | | Last series aired | 2019 | | Spin-offs (canon) | Young Sheldon (7 series), Georgie & Mandy (ongoing) | | Will there be more? | No (main show ended permanently) |

As of 2026, no. Jim Parsons has repeatedly stated he won’t return as Sheldon full-time. He did reprise the role for a voice cameo in Young Sheldon finale.

That is Georgie & Mandy’s First Marriage (2024–present), focusing on Sheldon’s older brother. Again, not TBBT.