Synopsis
Physicists Leonard and Sheldon find their nerd-centric social circle with pals Howard and Raj expanding when aspiring actress Penny moves in next door.
Episodes
1
PilotBrilliant 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.23m2
The Big Bran HypothesisLeonard 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.21m3
The Fuzzy Boots CorollaryLeonard asks a woman out after he finds out that Penny is seeing someone.22m4
The Luminous Fish EffectSheldon'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.21m5
The Hamburger PostulateFearing he's wasting his time on Penny, Leonard ends up making a connection with Leslie.20m6
The Middle-Earth ParadigmPenny hosts a Halloween party, putting Leonard, Sheldon, Wolowitz, and Koothrappali through a new test of their social skills.21m7
The Dumpling ParadoxWith Wolowitz AWOL with one of her friends, Penny's recruited to fill in for him on the guys' Halo team21m8
The Grasshopper ExperimentRaj's parents set him up on a blind date, but just when he discovers he can talk to her, she shows interest in Sheldon.20m9
The Cooper-Hofstadter PolarizationWhen 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.19m10
The Loobenfeld DecayLeonard and Sheldon each lie to avoid seeing Penny's concert, but Sheldon's is a bit too complicated for his own good.21m11
The Pancake Batter AnomalyWith 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.22m12
The Jerusalem DualityWith 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.20m13
The Bat Jar ConjectureSheldon 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.22m14
The Nerdvana AnnihilationWhen 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.20m15
The Pork Chop IndeterminacyThe 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.22m16
The Peanut ReactionPenny wants to throw a surprise party for Leonard, but Sheldon's indulgence at an electronics store throws her off-track.20m17
The Tangerine FactorPenny's break-up spurs Leonard to summon the courage to ask her out, and each goes to Sheldon for advice on their upcoming date.20m
PilotBrilliant 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.23m2The Big Bran HypothesisLeonard 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.21m3The Fuzzy Boots CorollaryLeonard asks a woman out after he finds out that Penny is seeing someone.22m4The Luminous Fish EffectSheldon'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.21m5The Hamburger PostulateFearing he's wasting his time on Penny, Leonard ends up making a connection with Leslie.20m6The Middle-Earth ParadigmPenny hosts a Halloween party, putting Leonard, Sheldon, Wolowitz, and Koothrappali through a new test of their social skills.21m7The Dumpling ParadoxWith Wolowitz AWOL with one of her friends, Penny's recruited to fill in for him on the guys' Halo team21m8The Grasshopper ExperimentRaj's parents set him up on a blind date, but just when he discovers he can talk to her, she shows interest in Sheldon.20m9The Cooper-Hofstadter PolarizationWhen 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.19m10The Loobenfeld DecayLeonard and Sheldon each lie to avoid seeing Penny's concert, but Sheldon's is a bit too complicated for his own good.21m11The Pancake Batter AnomalyWith 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.22m12The Jerusalem DualityWith 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.20m13The Bat Jar ConjectureSheldon 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.22m14The Nerdvana AnnihilationWhen 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.20m15The Pork Chop IndeterminacyThe 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.22m16The Peanut ReactionPenny wants to throw a surprise party for Leonard, but Sheldon's indulgence at an electronics store throws her off-track.20m17The Tangerine FactorPenny's break-up spurs Leonard to summon the courage to ask her out, and each goes to Sheldon for advice on their upcoming date.20mCast
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