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The Big Bang Theory Season 1

Pilot
Episode 1
Air Date: Sep 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 sci…

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The Big Bran Hypothesis
Episode 2
Air Date: Oct 1, 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…

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The Fuzzy Boots Corollary
Episode 3
Air Date: Oct 8, 2007

The Fuzzy Boots Corollary

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

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The Luminous Fish Effect
Episode 4
Air Date: Oct 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 fri…

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The Hamburger Postulate
Episode 5
Air Date: Oct 22, 2007

The Hamburger Postulate

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

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The Middle Earth Paradigm
Episode 6
Air Date: Oct 29, 2007

The Middle Earth Paradigm

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 Dumpling Paradox
Episode 7
Air Date: Nov 5, 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

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The Grasshopper Experiment
Episode 8
Air Date: Nov 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.

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The Cooper-Hofstadter Polarization
Episode 9
Air Date: Mar 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, …

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The Loobenfeld Decay
Episode 10
Air Date: Mar 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.

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The Pancake Batter Anomaly
Episode 11
Air Date: Mar 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'…

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The Jerusalem Duality
Episode 12
Air Date: Apr 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…

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The Bat Jar Conjecture
Episode 13
Air Date: Apr 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 supe…

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The Nerdvana Annihilation
Episode 14
Air Date: Apr 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…

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The Pork Chop Indeterminacy
Episode 15
Air Date: May 5, 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 …

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The Peanut Reaction
Episode 16
Air Date: 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.

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The Tangerine Factor
Episode 17
Air Date: 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.

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