1: Pilot
Sep 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.
Season 1
The Big Bang Theory
17 EPISODES • 2007
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.Episodes
2: The Big Bran Hypothesis
Oct 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.
3: The Fuzzy Boots Corollary
Oct 8, 2007
Leonard asks a woman out after he finds out that Penny is seeing someone.
4: The Luminous Fish Effect
Oct 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.
5: The Hamburger Postulate
Oct 22, 2007
Fearing he's wasting his time on Penny, Leonard ends up making a connection with Leslie.
6: The Middle-Earth Paradigm
Oct 29, 2007
Penny hosts a Halloween party, putting Leonard, Sheldon, Wolowitz, and Koothrappali through a new test of their social skills.
7: The Dumpling Paradox
Nov 5, 2007
With Wolowitz AWOL with one of her friends, Penny's recruited to fill in for him on the guys' Halo team
8: The Grasshopper Experiment
Nov 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.
9: The Cooper-Hofstadter Polarization
Mar 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.
10: The Loobenfeld Decay
Mar 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.
11: The Pancake Batter Anomaly
Mar 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.
12: The Jerusalem Duality
Apr 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.
13: The Bat Jar Conjecture
Apr 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.
14: The Nerdvana Annihilation
Apr 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.
15: The Pork Chop Indeterminacy
May 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.
16: The Peanut Reaction
May 12, 2008
Penny wants to throw a surprise party for Leonard, but Sheldon's indulgence at an electronics store throws her off-track.
17: The Tangerine Factor
May 19, 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.
Season 2
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