Leonard Hofstadter and Sheldon Cooper are both brilliant physicists working at Cal Tech in Pasadena, California. They are colleagues, best friends, and roommates, although in all capacities their relationship is always tested primarily by Sheldon's regimented, deeply eccentric, and non-conventional ways. They are also friends with their Cal Tech colleagues mechanical engineer Howard Wolowitz and astrophysicist Rajesh Koothrappali. The foursome spend their time working on their individual work projects, playing video games, watching science-fiction movies, or reading comic books. As they are self-professed nerds, all have little or no luck with women. When Penny, a pretty woman and an aspiring actress from Omaha, moves into the apartment across the hall from Leonard and Sheldon's, Leonard has another aspiration in life, namely to get Penny to be his girlfriend. Written by
When beauty meets the brains.
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Did You Know?
Earlier in the same season, in episode 3:5, The Creepy Candy Coating Corollary, Howard is introduced to Bernadette. As they get to know each other, he reveals that he lost his virginity in a car. Bernadette replies that she did as well. In this episode, Howard tells Raj and Leonard that he lost his virginity to his cousin and describes being at the back of the house during a family gathering. See more
In one of the episodes Sheldon mentions the Male Indian Peafowl as the "Male Peacock". That is a common mistake people make. The correct name for the bird is Indian Peafowl. The male is the Peacock and the female is the Peahen. See more
[repeated line when Sheldon tells a sarcastic joke
One of the final cards to appear in the credit sequence is the vanity card for Chuck Lorre Productions. In keeping with his practice on "Dharma and Greg" and "Two and a Half Men", there is a different message on the card each week, written by Chuck Lorre himself. See more
History of Everything (The Big Bang Theory Theme)
Music & lyrics by Barenaked Ladies
Performed by Barenaked Ladies
Played during the opening titles See more