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 8.31/10 (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 8.4/10 (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 7.83/10 (aired on 10/08/2007)

Leonard asks a woman out after he finds out that Penny is seeing someone.
S01E04

S01E04 : The Luminous Fish Effect 8.22/10 (aired on 10/15/2007)

Sheldon's getting fired forces him to explore what life has to offer outside physics, leaving…
S01E05

S01E05 : The Hamburger Postulate 8.03/10 (aired on 10/22/2007)

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

S01E06 : The Middle Earth Paradigm 8.49/10 (aired on 10/29/2007)

Penny hosts a Hallowe'en party, putting Leonard, Sheldon, Wolowitz, and Koothrappali through a new…
S01E07

S01E07 : The Dumpling Paradox 8.22/10 (aired on 11/05/2007)

With Wolowitz AWOL with one of her friends, Penny's recruited to fill in for him on the guys' Halo…
S01E08

S01E08 : The Grasshopper Experiment 8.31/10 (aired on 11/12/2007)

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

S01E09 : The Cooper-Hofstadter Polarization 8.12/10 (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 8.12/10 (aired on 03/24/2008)

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

S01E11 : The Pancake Batter Anomaly 8.2/10 (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 8.02/10 (aired on 04/14/2008)

With Sheldon rattled over meeting Dennis, a 15-year-old physicist who's smarter than he, Leonard…
S01E13

S01E13 : The Bat Jar Conjecture 8.38/10 (aired on 04/21/2008)

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

S01E14 : The Nerdvana Annihilation 8.22/10 (aired on 04/28/2008)

When delivery of another collectible leads to Penny's lashing out at Leonard, he decides it's time…
S01E15

S01E15 : The Pork Chop Indeterminacy 8.31/10 (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 8.38/10 (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 8.6/10 (aired on 05/19/2008)

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