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S01E01 – Pilot

Brilliant physicist roommates Leonard and Sheldon meet their new neighbor Penny, who begins ...
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S01E02 – The Big Bran Hypothesis

Leonard volunteers to sign for a package in an attempt to make a ...
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S01E03 – The Fuzzy Boots Corollary

Leonard asks a woman out after he finds out that Penny is seeing ...
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S01E04 – The Luminous Fish Effect

Sheldon's getting fired forces him to explore what life has to offer outside ...
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S01E05 – The Hamburger Postulate

Fearing he's wasting his time on Penny, Leonard ends up making a connection ...
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S01E06 – The Middle Earth Paradigm

Penny hosts a Hallowe'en party, putting Leonard, Sheldon, Wolowitz, and Koothrappali through a ...
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S01E07 – The Dumpling Paradox

With Wolowitz AWOL with one of her friends, Penny's recruited to fill in ...
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S01E08 – The Grasshopper Experiment

Raj's parents set him up on a blind date, but just when he ...
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S01E09 – The Cooper-Hofstadter Polarization

When they're invited to present at a physics conference, Sheldon's reluctance to share ...
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S01E10 – The Loobenfeld Decay

Leonard and Sheldon each lie to avoid seeing Penny's concert, but Sheldon's is ...
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S01E11 – The Pancake Batter Anomaly

With his friends knowing how sour he acts when sickā€”and avoiding him as ...
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S01E12 – The Jerusalem Duality

With Sheldon rattled over meeting Dennis, a 15-year-old physicist who's smarter than he, ...
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S01E13 – The Bat Jar Conjecture

Sheldon finds himself booted from the gang's Physics Bowl team and replaced with ...
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S01E14 – The Nerdvana Annihilation

When delivery of another collectible leads to Penny's lashing out at Leonard, he ...
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S01E15 – The Pork Chop Indeterminacy

The rest of the gang fall for Sheldon's twin sister, and Leonard's plan ...
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S01E16 – The Peanut Reaction

Penny wants to throw a surprise party for Leonard, but Sheldon's indulgence at ...
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S01E17 – The Tangerine Factor

Penny's break-up spurs Leonard to summon the courage to ask her out, and ...
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