Episode 1
Pilot
2007-09-24 • 23 min
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.
TV season
2007-09-24
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.
Episode 1
2007-09-24 • 23 min
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.
Episode 2
2007-10-01 • 21 min
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.
Episode 3
2007-10-08 • 22 min
Leonard asks a woman out after he finds out that Penny is seeing someone.
Episode 4
2007-10-15 • 21 min
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.
Episode 5
2007-10-22 • 20 min
Fearing he's wasting his time on Penny, Leonard ends up making a connection with Leslie.
Episode 6
2007-10-29 • 21 min
Penny hosts a Halloween party, putting Leonard, Sheldon, Wolowitz, and Koothrappali through a new test of their social skills.
Episode 7
2007-11-05 • 21 min
With Wolowitz AWOL with one of her friends, Penny's recruited to fill in for him on the guys' Halo team
Episode 8
2007-11-12 • 20 min
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.
Episode 9
2008-03-17 • 19 min
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.
Episode 10
2008-03-24 • 21 min
Leonard and Sheldon each lie to avoid seeing Penny's concert, but Sheldon's is a bit too complicated for his own good.
Episode 11
2008-03-31 • 22 min
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.
Episode 12
2008-04-14 • 20 min
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.
Episode 13
2008-04-21 • 22 min
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.
Episode 14
2008-04-28 • 20 min
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.
Episode 15
2008-05-05 • 22 min
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.
Episode 16
2008-05-12 • 20 min
Penny wants to throw a surprise party for Leonard, but Sheldon's indulgence at an electronics store throws her off-track.
Episode 17
2008-05-19 • 20 min
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.