There are seven main characters on the beloved CBS sitcom "The Big Bang Theory" — so who's the worst, and who's the best?

Some of the best plot twists on The Big Bang Theory altered the characters’ storylines and the viewers' perception of their realities.

Like any long-term sitcom, The Big Bang Theory also revealed its weaknesses over the course of its 12 seasons, but its weakest link only became evident 13 years ago. Its longevity could have only been ...

"The Big Bang Theory" was not gifted with a complex overarching plot, but it definitely had storylines that carried over from one episode to another. Its tales underlined each character's personal ...

Sheldon learns that his mother will not be attending his and Amy's wedding unless Sheldon invites his older brother, Georgie (who now prefers to be called George), which Sheldon had no intention of ...

Bert returns in season 7 in a memorable episode titled The Occupation Recalibration, and ends up in a storyline with Amy. This is actually where Bert is introduced formally to Howard and Raj and the ...