The Big Bang Theory Season 1 poster

The Big Bang Theory — Season 1

Smart is the new sexy.

200717 episodes7.5/10 (1,226 votes)

About this season

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 (17)

Pilot
E1

1. Pilot

7.4

Aired 24 September 2007 • 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.

The Big Bran Hypothesis
E2

2. The Big Bran Hypothesis

7.5

Aired 1 October 2007 • 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.

The Fuzzy Boots Corollary
E3

3. The Fuzzy Boots Corollary

7.1

Aired 8 October 2007 • 22 min

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

The Luminous Fish Effect
E4

4. The Luminous Fish Effect

7.5

Aired 15 October 2007 • 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.

The Hamburger Postulate
E5

5. The Hamburger Postulate

7.6

Aired 22 October 2007 • 20 min

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

The Middle-Earth Paradigm
E6

6. The Middle-Earth Paradigm

7.6

Aired 29 October 2007 • 21 min

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

The Dumpling Paradox
E7

7. The Dumpling Paradox

7.8

Aired 5 November 2007 • 21 min

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

The Grasshopper Experiment
E8

8. The Grasshopper Experiment

7.5

Aired 12 November 2007 • 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.

The Cooper-Hofstadter Polarization
E9

9. The Cooper-Hofstadter Polarization

7.6

Aired 17 March 2008 • 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.

The Loobenfeld Decay
E10

10. The Loobenfeld Decay

7.4

Aired 24 March 2008 • 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.

The Pancake Batter Anomaly
E11

11. The Pancake Batter Anomaly

7.7

Aired 31 March 2008 • 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.

The Jerusalem Duality
E12

12. The Jerusalem Duality

7.2

Aired 14 April 2008 • 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.

The Bat Jar Conjecture
E13

13. The Bat Jar Conjecture

7.7

Aired 21 April 2008 • 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.

The Nerdvana Annihilation
E14

14. The Nerdvana Annihilation

7.4

Aired 28 April 2008 • 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.

The Pork Chop Indeterminacy
E15

15. The Pork Chop Indeterminacy

7.5

Aired 5 May 2008 • 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.

The Peanut Reaction
E16

16. The Peanut Reaction

7.6

Aired 12 May 2008 • 20 min

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

The Tangerine Factor
E17

17. The Tangerine Factor

7.9

Aired 19 May 2008 • 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.

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