The Big Bang Theory

Season
  • The Tangerine Factor

    The Tangerine Factor Edit this episode

    Season 1, Episode 17 - Aired 05/19/2008

    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.

  • The Peanut Reaction

    The Peanut Reaction Edit this episode

    Season 1, Episode 16 - Aired 05/12/2008

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

  • The Pork Chop Indeterminacy

    The Pork Chop Indeterminacy Edit this episode

    Season 1, Episode 15 - Aired 05/05/2008

    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.

  • The Nerdvana Annihilation

    The Nerdvana Annihilation Edit this episode

    Season 1, Episode 14 - Aired 04/28/2008

    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.

  • The Bat Jar Conjecture

    The Bat Jar Conjecture Edit this episode

    Season 1, Episode 13 - Aired 04/21/2008

    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.

  • The Jerusalem Duality

    The Jerusalem Duality Edit this episode

    Season 1, Episode 12 - Aired 04/14/2008

    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.

  • The Pancake Batter Anomaly

    The Pancake Batter Anomaly Edit this episode

    Season 1, Episode 11 - Aired 03/31/2008

    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.

  • The Loobenfeld Decay

    The Loobenfeld Decay Edit this episode

    Season 1, Episode 10 - Aired 03/24/2008

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

  • The Cooper-Hofstadter Polarization

    The Cooper-Hofstadter Polarization Edit this episode

    Season 1, Episode 9 - Aired 03/17/2008

    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.

  • The Grasshopper Experiment

    The Grasshopper Experiment Edit this episode

    Season 1, Episode 8 - Aired 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.

  • The Dumpling Paradox

    The Dumpling Paradox Edit this episode

    Season 1, Episode 7 - Aired 11/05/2007

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

  • The Middle Earth Paradigm

    The Middle Earth Paradigm Edit this episode

    Season 1, Episode 6 - Aired 10/29/2007

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

  • The Hamburger Postulate

    The Hamburger Postulate Edit this episode

    Season 1, Episode 5 - Aired 10/22/2007

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

  • The Luminous Fish Effect

    The Luminous Fish Effect Edit this episode

    Season 1, Episode 4 - Aired 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.

  • The Fuzzy Boots Corollary

    The Fuzzy Boots Corollary Edit this episode

    Season 1, Episode 3 - Aired 10/08/2007

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

  • The Big Bran Hypothesis

    The Big Bran Hypothesis Edit this episode

    Season 1, Episode 2 - Aired 10/01/2007

    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.

  • Pilot

    Pilot Edit this episode

    Season 1, Episode 1 - Aired 09/24/2007

    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.

  • Unaired Pilot

    Unaired Pilot Edit this episode

    Season 1, Episode 0 - Aired Unknown