The Big Bang Theory

Season 1

17 episodes 13 seasons

University physicists Leonard and Sheldon know whether to use an integral or a differential to solve the area under a curve. But they don't have a clue about girls. Or dating. Or clothes. Or parties. Or having fun. Or, basically, life. So when a pretty blonde named Penny moves in the apartment across the hall, the guys decide to get an education outside of the classroom. Boys, you have a lot to learn.

Release Date

Premiered

The Big Bang Theory Season 1 released on September 24, 2007.

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Episodes

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S01E01 Aired September 24, 2007

Pilot

Brilliant physicist roommates Leonard and Sheldon meet their new neighbor Penny, who begins showing them that as much as they know about science, they know little about actual living.

S01E02 Aired October 01, 2007

The Big Bran Hypothesis

Leonard volunteers to sign for a package in an attempt to make a good impression on Penny, but when he enlists Sheldon for help, his attempt at chivalry goes terribly awry.

S01E03 Aired October 08, 2007

The Fuzzy Boots Corollary

Leonard asks a woman out after he finds out that Penny is seeing someone.

S01E04 Aired October 15, 2007

The Luminous Fish Effect

Sheldon's getting fired forces him to explore what life has to offer outside physics, leaving Leonard to take drastic action to snap his friend out of his funk.

S01E05 Aired October 22, 2007

The Hamburger Postulate

Fearing he's wasting his time on Penny, Leonard ends up making a connection with Leslie.

S01E06 Aired October 29, 2007

The Middle-Earth Paradigm

Penny hosts a Halloween party, putting Leonard, Sheldon, Wolowitz, and Koothrappali through a new test of their social skills.

S01E07 Aired November 05, 2007

The Dumpling Paradox

With Wolowitz AWOL with one of her friends, Penny's recruited to fill in for him on the guys' Halo team

S01E08 Aired November 12, 2007

The Grasshopper Experiment

Raj's parents set him up on a blind date, but just when he discovers he can talk to her, she shows interest in Sheldon.

S01E09 Aired March 17, 2008

The Cooper-Hofstadter Polarization

When they're invited to present at a physics conference, Sheldon's reluctance to share the credit leads to a tiff between him and Leonard, and Penny's intervention only exacerbates the situation.

S01E10 Aired March 24, 2008

The Loobenfeld Decay

Leonard and Sheldon each lie to avoid seeing Penny's concert, but Sheldon's is a bit too complicated for his own good.

S01E11 Aired March 31, 2008

The Pancake Batter Anomaly

With his friends knowing how sour he acts when sick—and avoiding him as a result—Sheldon is nursed by Penny, who hasn't a clue what she's in for.

S01E12 Aired April 14, 2008

The Jerusalem Duality

With Sheldon rattled over meeting Dennis, a 15-year-old physicist who's smarter than he, Leonard helps him look for a way to debunk Dennis's research.

S01E13 Aired April 21, 2008

The Bat Jar Conjecture

Sheldon finds himself booted from the gang's Physics Bowl team and replaced with Leslie, so he forms his own team, hoping to prove he's superior.

S01E14 Aired April 28, 2008

The Nerdvana Annihilation

When delivery of another collectible leads to Penny's lashing out at Leonard, he decides it's time to give up his habit, much to his friends' protestation.

S01E15 Aired May 05, 2008

The Pork Chop Indeterminacy

The rest of the gang fall for Sheldon's twin sister, and Leonard's plan to win her heart is derailed when Sheldon declares he'll be the one to decide who can date her.

S01E16 Aired May 12, 2008

The Peanut Reaction

Penny wants to throw a surprise party for Leonard, but Sheldon's indulgence at an electronics store throws her off-track.

S01E17 Aired May 19, 2008

The Tangerine Factor

Penny's break-up spurs Leonard to summon the courage to ask her out, and each goes to Sheldon for advice on their upcoming date.