This series about nerdish physicists started in 2007 and the final season was released in 2019. There are 12 seasons, with 279 episodes in total, and The Big Bang Theory is the longest sitcom in the history of television. The star of the show is Sheldon Cooper, who is played by Jim Parsons. The actor got 4 Emmys for this role. So, today, the 47-year-old Parsons is often called Sheldon by his many fans.