Etc. Etc. Barenaked Ladies' performance of the "The Big Bang Theory" theme song was characteristically sesquipedalian, speeding through its lyrics as it describes the formation of the universe.

When the creators of The Big Bang Theory were coming up with the show, they had a different plan for the main characters.

Many of the characters who appeared in The Big Bang Theory only for a cameo helped add depth to key details that were crucial in the broader context. How could Leonard and Penny become a couple ...