Season 1
17 episodes · Sep 24, 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.
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S1E1Pilot
Sep 24, 200723mBrilliant 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.
S1E2The Big Bran Hypothesis
Oct 1, 200721mLeonard 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.
S1E3The Fuzzy Boots Corollary
Oct 8, 200722mLeonard asks a woman out after he finds out that Penny is seeing someone.
S1E4The Luminous Fish Effect
Oct 15, 200721mSheldon'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.
S1E5The Hamburger Postulate
Oct 22, 200720mFearing he's wasting his time on Penny, Leonard ends up making a connection with Leslie.
S1E6The Middle-Earth Paradigm
Oct 29, 200721mPenny hosts a Halloween party, putting Leonard, Sheldon, Wolowitz, and Koothrappali through a new test of their social skills.
S1E7The Dumpling Paradox
Nov 5, 200721mWith Wolowitz AWOL with one of her friends, Penny's recruited to fill in for him on the guys' Halo team
S1E8The Grasshopper Experiment
Nov 12, 200720mRaj's parents set him up on a blind date, but just when he discovers he can talk to her, she shows interest in Sheldon.
S1E9The Cooper-Hofstadter Polarization
Mar 17, 200819mWhen 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.
S1E10The Loobenfeld Decay
Mar 24, 200821mLeonard and Sheldon each lie to avoid seeing Penny's concert, but Sheldon's is a bit too complicated for his own good.
S1E11The Pancake Batter Anomaly
Mar 31, 200822mWith 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.
S1E12The Jerusalem Duality
Apr 14, 200820mWith 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.
S1E13The Bat Jar Conjecture
Apr 21, 200822mSheldon 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.
S1E14The Nerdvana Annihilation
Apr 28, 200820mWhen 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.
S1E15The Pork Chop Indeterminacy
May 5, 200822mThe 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.
S1E16The Peanut Reaction
May 12, 200820mPenny wants to throw a surprise party for Leonard, but Sheldon's indulgence at an electronics store throws her off-track.
S1E17The Tangerine Factor
May 19, 200820mPenny's break-up spurs Leonard to summon the courage to ask her out, and each goes to Sheldon for advice on their upcoming date.