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The Best Big Bang Theory Episodes of All Time

After 12 seasons, there are so many good episodes of The Big Bang Theory, but which ones really stand out? Do you like "The Bath Item Gift Hypothesis" the best, or is "The Excelsior Acquisition" your favorite episode of The Big Bang Theory? To determine once and for all what the best episodes of The Big Bang Theory are, let's rank every The Big Bang Theory episode from best to worst on this list of the best Big Bang Theory episodes, as voted on by other fans of the series. The Big Bang Theory was a popular American sitcom on CBS. The show received countless awards and remains to be one of the most dominant television programs of the last 25 years. With so many memorable episodes of the show, it's hard to trust just one person's opinion of what the top The Big Bang Theory episodes of all time are.

Fans of The Big Bang Theory are extremely passionate about the show, and there is often debate over which episodes are better than others. That's why this list exists- so you can vote for your favorites and we can find out once and for all what everyone thinks the best episode is. Episodes include everything from "The Love Car Displacement" to "The Vegas Renormalization." What are the best The Big Bang episodes of all time? Look below and find out and vote your favorites to the top! Then check out the best Big Bang Theory holiday episodes.

  • 1

    The Adhesive Duck Deficiency

    November 16, 2009

    SeriesThe Big Bang Theory

    Season 3, Episode 8

    With Leonard, Howard and Raj away camping in the desert, an injured Penny has only Sheldon to rely on.
  • 2

    The Gorilla Experiment

    December 7, 2009

    SeriesThe Big Bang Theory

    Season 3, Episode 10

    Penny gets help from Sheldon in order to understand what Leonard's work is, while Wolowitz develops a jealousy when Leonard starts hanging out with his new girlfriend.
  • 3

    The Fuzzy Boots Corollary

    October 8, 2007

    Season 1, Episode 3

    Leonard asks a woman out after he finds out that Penny is seeing someone.
  • Season 1, Episode 15

    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.  ...more
  • 5

    The Bath Item Gift Hypothesis

    December 15, 2008

    SeriesThe Big Bang Theory

    Season 2, Episode 11

    Penny starts dating Leonard's handsome colleague; Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.
  • 6

    The Spaghetti Catalyst

    May 3, 2010

    SeriesThe Big Bang Theory

    Season 3, Episode 20

    When Leonard and Penny aren't speaking, Sheldon goes to extremes to keep them both happy.
  • 7

    The Zazzy Substitution

    October 7, 2010

    SeriesThe Big Bang Theory

    Season 4. Episode 3

    The guys are concerned as Sheldon searches for an alternative to human companionship.
  • 8

    The Staircase Implementation

    May 17, 2010

    SeriesThe Big Bang Theory

    Season 3, Episode 22

    Leonard tells Penny about how he met Sheldon for the first time...and what happened to the elevator.
  • 9

    The Wheaton Recurrence

    April 12, 2010

    SeriesThe Big Bang Theory

    Season 3, Episode 19

    A fight between Leonard and Penny threatens their relationship, while Sheldon battles Wil Wheaton in bowling.
  • 10

    The Pants Alternative

    March 22, 2010

    SeriesThe Big Bang Theory

    Season 3, Episode 18

    Sheldon's friends come to his aid when his fear of public speaking stands between him and a coveted award.
  • 11

    The Scavenger Vortex

    October 3, 2013

    SeriesThe Big Bang Theory

    Season 7, Episode 3

    When the entire gang competes in a scavenger hunt designed by Raj, it brings out the best - and worst - in everyone.
  • 76

    Season 1, Episode 6

    Penny hosts a Hallowe'en party, putting Leonard, Sheldon, Wolowitz, and Koothrappali through a new test of their social skills.  ...more
  • 13

    The Thanksgiving Decoupling

    November 21, 2013

    Season 7, Episode 9

    Sheldon protests when the gang drags him to Mrs. Wolowitz’s house for Thanksgiving. Meanwhile, Penny and Leonard must deal with a mistake from her past.

  • 14

    The Barbarian Sublimation

    October 6, 2008

    SeriesThe Big Bang Theory

    Season 2, Episode 3

    Sheldon creates a monster when he introduces Penny to online gaming.
  • 46

    Season 6, Episode 4

    When Wolowitz returns from space, he doesn’t get the hero’s welcome he expected. Meanwhile, Game Night turns into a battle of the sexes.  ...more
  • 16

    The Precious Fragmentation

    March 8, 2010

    SeriesThe Big Bang Theory

    Season 3, Episode 17

    When the guys find a ring from "The Lord of the Rings" at a garage sale, it threatens to tear them apart.
  • October 20, 2008

    Season 2, Episode 5

    Leonard and his friends stage an intervention to force Sheldon to face his fear of driving.  ...more
  • 18

    The Spoiler Alert Segmentation

    February 7, 2013

    SeriesThe Big Bang Theory

    A fight between Sheldon and Leonard impacts Amy and Penny's living arrangements; while Howard is away, Raj helps Mrs. Wolowitz out.
  • 19

    The Closure Alternative

    April 25, 2013

    SeriesThe Big Bang Theory

    Season 6, Episode 21

    Amy tries to help Sheldon get over his compulsive need for closure when one of his favorite TV shows is canceled; Raj discovers a secret about Lucy.
  • 20

    The Guitarist Amplification

    November 9, 2009

    SeriesThe Big Bang Theory

    Season 3, Episode 7

    A squabble between Leonard and Penny sees Sheldon playing mediator, though out of his own incovenience from the sitiation rather than altruism.
  • 21

    The Jiminy Conjecture

    September 28, 2009

    SeriesThe Big Bang Theory

    Season 3, Episode 2

    Leonard and Penny struggle to recover from an awkward first hookup while Sheldon and Howard stake their best comic books on a bet to determine the species of a cricket.  ...more
  • 22

    The Meemaw Materialization

    February 4, 2016

    Season 9, Episode 14

    Meemaw meets Amy, but it isn't all roses. Meemaw seems to have an axe to grind with her. Sheldon comes to Amy's defense, but not before Meemaw lets a little secret of his slip.

  • 23

    The Comic Book Store Regeneration

    February 19, 2015

    Season 8, Episode 15

    Wolowitz receives some shocking news as everyone prepares for the reopening of Stuart’s comic book store. Penny teaches Sheldon how to “let it go,” but can’t follow her own advice after she learns something infuriating about Amy. Also, Leonard and Raj think they spot Nathan Fillion at a restaurant.

  • 24


    September 24, 2007

    Season 1, Episode 1

    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.

  • 25

    The Fish Guts Displacement

    December 6, 2012

    SeriesThe Big Bang Theory

    Season 6, Episode 10

    When Amy gets sick, Sheldon tries to nurse her back to health; Wolowitz and his father-in-law plan a fishing trip.  ...more