Season 1

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.

Season episodes list 1

S01E01

S01E01 : Pilot 7.87/10 (aired on 09/24/2007)

Brilliant physicist roommates Leonard and Sheldon meet their new neighbor Penny, who begins showing…
S01E02

S01E02 : The Big Bran Hypothesis 7.88/10 (aired on 10/01/2007)

Leonard volunteers to sign for a package in an attempt to make a good impression on Penny, but when…
S01E03

S01E03 : The Fuzzy Boots Corollary 7.51/10 (aired on 10/08/2007)

When Leonard learns Penny is seeing someone, he decided to asks a nerdy female co-worker out on a…
S01E04

S01E04 : The Luminous Fish Effect 7.75/10 (aired on 10/15/2007)

When Sheldon gets fired and decides to explore life beyond physics, it's up to Leonard to take…
S01E05

S01E05 : The Hamburger Postulate 7.7/10 (aired on 10/22/2007)

Fearing he's wasting his time on Penny, Leonard ends up making a connection with colleague Leslie…
S01E06

S01E06 : The Middle Earth Paradigm 7.9/10 (aired on 10/29/2007)

Penny hosts a Halloween party, that ends up putting Leonard, Sheldon, Wolowitz, and Koothrappali…
S01E07

S01E07 : The Dumpling Paradox 7.82/10 (aired on 11/05/2007)

When Wolowitz seduces one of Penny's friend who then takes over her apartment, Penny sleeps on…
S01E08

S01E08 : The Grasshopper Experiment 7.85/10 (aired on 11/12/2007)

Raj's parents set him up on a blind date, but just when he discovers he can talk to his date, she…
S01E09

S01E09 : The Cooper-Hofstadter Polarization 7.72/10 (aired on 03/17/2008)

When they're invited to present at a physics conference, Sheldon's reluctance to share the credit…
S01E10

S01E10 : The Loobenfeld Decay 7.73/10 (aired on 03/24/2008)

Leonard and Sheldon each lie to avoid seeing Penny's concert, but Sheldon's lie is a bit too…
S01E11

S01E11 : The Pancake Batter Anomaly 7.66/10 (aired on 03/31/2008)

With his friends knowing how sour he acts when sick—and avoiding him as a result—Sheldon is nursed…
S01E12

S01E12 : The Jerusalem Duality 7.62/10 (aired on 04/14/2008)

When Sheldon meets a 15-year-old physicist prodigy, he's rattled and threatened and Leonard tries…
S01E13

S01E13 : The Bat Jar Conjecture 7.79/10 (aired on 04/21/2008)

Sheldon finds himself booted from the gang's Physics Bowl team and replaced by Leslie Winkle, so he…
S01E14

S01E14 : The Nerdvana Annihilation 7.83/10 (aired on 04/28/2008)

When the guys buy a time machine prop from a classic 1960 movie, Penny lashes out at Leonard and he…
S01E15

S01E15 : The Pork Chop Indeterminacy 7.85/10 (aired on 05/05/2008)

The rest of the gang fall for Sheldon's twin sister, and Leonard's plan to win her heart is…
S01E16

S01E16 : The Peanut Reaction 7.78/10 (aired on 05/12/2008)

Penny wants to throw a surprise party for Leonard, but Sheldon's indulgence at an electronics store…
S01E17

S01E17 : The Tangerine Factor 8.07/10 (aired on 05/19/2008)

Penny's break-up spurs Leonard to summon up the courage to ask her out, and each head to Sheldon…