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Season 1 Episodes

Episode Guide

The Tangerine Factor

Season 1, Episode 17 - Air Date: 5/21/2008
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.
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The Peanut Reaction

Season 1, Episode 16 - Air Date: 5/12/2008
Penny wants to throw a surprise party for Leonard, but Sheldon's indulgence at an electronics store throws her off-track.
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The Pork Chop Indeterminacy

Season 1, Episode 15 - Air Date: 5/5/2008
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.
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The Nerdvana Annihilation

Season 1, Episode 14 - Air Date: 4/28/2008
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.
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The Bat Jar Conjecture

Season 1, Episode 13 - Air Date: 4/21/2008
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.
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The Jerusalem Duality

Season 1, Episode 12 - Air Date: 4/14/2008
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.
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The Pancake Batter Anomaly

Season 1, Episode 11 - Air Date: 3/31/2008
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.
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The Loobenfeld Decay

Season 1, Episode 10 - Air Date: 3/24/2008
Leonard and Sheldon each lie to avoid seeing Penny's concert, but Sheldon's is a bit too complicated for his own good.
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The Cooper-Hofstadter Polarization

Season 1, Episode 9 - Air Date: 3/17/2008
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.
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The Grasshopper Experiment

Season 1, Episode 8 - Air Date: 11/12/2007
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.
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The Dumpling Paradox

Season 1, Episode 7 - Air Date: 11/5/2007
With Wolowitz AWOL with one of her friends, Penny's recruited to fill in for him on the guys' Halo team
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The Middle Earth Paradigm

Season 1, Episode 6 - Air Date: 10/29/2007
Penny hosts a Hallowe'en party, putting Leonard, Sheldon, Wolowitz, and Koothrappali through a new test of their social skills.
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The Hamburger Postulate

Season 1, Episode 5 - Air Date: 10/22/2007
Fearing he's wasting his time on Penny, Leonard ends up making a connection with Leslie.
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The Luminous Fish Effect

Season 1, Episode 4 - Air Date: 10/15/2007
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.
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The Fuzzy Boots Corollary

Season 1, Episode 3 - Air Date: 10/8/2007
Leonard asks a woman out after he finds out that Penny is seeing someone.
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The Big Bran Hypothesis

Season 1, Episode 2 - Air Date: 10/1/2007
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.
Episode Guide

Pilot

Season 1, Episode 1 - Air Date: 9/24/2007
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.

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