The Big Bang Theory is a popular American sitcom that aired from 2007 to 2019. The show revolves around a group of socially awkward scientists and their interactions with their neighbor, Penny. The main characters include Sheldon, Leonard, Howard, Raj, and Penny. The show is known for its humor, pop culture references, and scientific themes. It has won numerous awards and has been praised for its portrayal of geek culture. The show's popularity led to spin-offs and merchandise. The Big Bang Theory has been widely watched and enjoyed by audiences around the world.