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The Big Bang Theory Season 1

The Big Bang Theory Season 1


University physicists, Leonard and Sheldon excel in their expertise. However, they have no idea about getting along with girls. Also, they know nothing about dating, clothes, parties, and life. So when a pretty young woman named Penny enters the apartment, the guys decide to learn something new outside the classroom.

air date

September. 24,2007


James Burrows, Mark Cendrowski, Bob Koherr, Andrew D. Weyman, Ted Wass, Joel Murray


Bill Prady, Chuck Lorre

production companies

Warner Bros. Television, Chuck Lorre Productions

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The Big Bang Theory Season 1 Episode Guide


S1 E1 Pilot

Sep. 24,2007

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.

The Big Bran Hypothesis

S1 E2 The Big Bran Hypothesis

Oct. 01,2007

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.

The Fuzzy Boots Corollary

S1 E3 The Fuzzy Boots Corollary

Oct. 08,2007

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

The Luminous Fish Effect

S1 E4 The Luminous Fish Effect

Oct. 15,2007

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.

The Hamburger Postulate

S1 E5 The Hamburger Postulate

Oct. 22,2007

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

The Middle-Earth Paradigm

S1 E6 The Middle-Earth Paradigm

Oct. 29,2007

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

The Dumpling Paradox

S1 E7 The Dumpling Paradox

Nov. 05,2007

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

The Grasshopper Experiment

S1 E8 The Grasshopper Experiment

Nov. 12,2007

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.

The Cooper-Hofstadter Polarization

S1 E9 The Cooper-Hofstadter Polarization

Mar. 17,2008

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.

The Loobenfeld Decay

S1 E10 The Loobenfeld Decay

Mar. 24,2008

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

The Pancake Batter Anomaly

S1 E11 The Pancake Batter Anomaly

Mar. 31,2008

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.

The Jerusalem Duality

S1 E12 The Jerusalem Duality

Apr. 14,2008

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.

The Bat Jar Conjecture

S1 E13 The Bat Jar Conjecture

Apr. 21,2008

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.

The Nerdvana Annihilation

S1 E14 The Nerdvana Annihilation

Apr. 28,2008

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.

The Pork Chop Indeterminacy

S1 E15 The Pork Chop Indeterminacy

May. 05,2008

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.

The Peanut Reaction

S1 E16 The Peanut Reaction

May. 12,2008

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

The Tangerine Factor

S1 E17 The Tangerine Factor

May. 19,2008

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.

More Episodes

Cast of The Big Bang Theory Season 1

Johnny Galecki

Leonard Hofstadter

Jim Parsons

Sheldon Cooper

Kaley Cuoco


Simon Helberg

Howard Wolowitz

Kunal Nayyar

Rajesh Koothrappali

Melissa Rauch

Bernadette Rostenkowski

Mayim Bialik

Amy Farrah Fowler