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Season 1 Episodes

Episodes

Pilot

1. Pilot

23 min
9/24/2007

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.

S1 E1
The Big Bran Hypothesis

2. The Big Bran Hypothesis

21 min
10/1/2007

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.

S1 E2
The Fuzzy Boots Corollary

3. The Fuzzy Boots Corollary

22 min
10/8/2007

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

S1 E3
The Luminous Fish Effect

4. The Luminous Fish Effect

21 min
10/15/2007

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.

S1 E4
The Hamburger Postulate

5. The Hamburger Postulate

20 min
10/22/2007

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

S1 E5
The Middle-Earth Paradigm

6. The Middle-Earth Paradigm

21 min
10/29/2007

Penny hosts a Halloween party, putting Leonard, Sheldon, Wolowitz, and Koothrappali through a new test of their social skills.

S1 E6
The Dumpling Paradox

7. The Dumpling Paradox

21 min
11/5/2007

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

S1 E7
The Grasshopper Experiment

8. The Grasshopper Experiment

20 min
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 interest in Sheldon.

S1 E8
The Cooper-Hofstadter Polarization

9. The Cooper-Hofstadter Polarization

19 min
3/17/2008

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.

S1 E9
The Loobenfeld Decay

10. The Loobenfeld Decay

21 min
3/24/2008

Leonard and Sheldon each lie to avoid seeing Penny's concert, but Sheldon's is a bit too complicated for his own good.

S1 E10
The Pancake Batter Anomaly

11. The Pancake Batter Anomaly

22 min
3/31/2008

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.

S1 E11
The Jerusalem Duality

12. The Jerusalem Duality

20 min
4/14/2008

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.

S1 E12
The Bat Jar Conjecture

13. The Bat Jar Conjecture

22 min
4/21/2008

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.

S1 E13
The Nerdvana Annihilation

14. The Nerdvana Annihilation

20 min
4/28/2008

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.

S1 E14
The Pork Chop Indeterminacy

15. The Pork Chop Indeterminacy

22 min
5/5/2008

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.

S1 E15
The Peanut Reaction

16. The Peanut Reaction

20 min
5/12/2008

Penny wants to throw a surprise party for Leonard, but Sheldon's indulgence at an electronics store throws her off-track.

S1 E16
The Tangerine Factor

17. The Tangerine Factor

20 min
5/19/2008

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.

S1 E17

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Season 1

Season 1

7.4/10
2007
17 Episodes

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.

Cast