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The Best Big Bang Theory Episodes of All Time  

Ranker TV
2.7k votes 267 voters 8.8k views 279 items

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.

list ordered by
1
The Staircase Implementation is listed (or ranked) 1 on the list The Best Big Bang Theory Episodes of All Time
The Staircase Implementation May 17, 2010

Season 3, Episode 22

Leonard tells Penny about how he met Sheldon for the first time...and what happened to the elevator.
2
The Bath Item Gift Hypothesis is listed (or ranked) 2 on the list The Best Big Bang Theory Episodes of All Time
The Bath Item Gift Hypothesis December 15, 2008

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.
3
The Panty Piñata Polarization is listed (or ranked) 3 on the list The Best Big Bang Theory Episodes of All Time
November 10, 2008

Season 2, Episode 7

When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate.
4
The Justice League Recombinati... is listed (or ranked) 4 on the list The Best Big Bang Theory Episodes of All Time
December 16, 2010

Season 4. Episode 11

The guys find a "super" use for Penny's new boyfriend, Zack, when they enter a costume contest as the Justice League.
5
The Einstein Approximation is listed (or ranked) 5 on the list The Best Big Bang Theory Episodes of All Time
February 1, 2010

Season 3, Episode 14

Sheldon's search for the answer to a physics problem leads him to work at the Cheesecake Factory with Penny.
6
The Euclid Alternative is listed (or ranked) 6 on the list The Best Big Bang Theory Episodes of All Time
October 20, 2008

Season 2, Episode 5

Leonard and his friends stage an intervention to force Sheldon to face his fear of driving.
7
The Middle Earth Paradigm is listed (or ranked) 7 on the list The Best Big Bang Theory Episodes of All Time
October 29, 2007

Season 1, Episode 6

Penny hosts a Hallowe'en party, putting Leonard, Sheldon, Wolowitz, and Koothrappali through a new test of their social skills.
8
The Excelsior Acquisition is listed (or ranked) 8 on the list The Best Big Bang Theory Episodes of All Time
The Excelsior Acquisition March 1, 2010

Season 3, Episode 16

Sheldon winds up in traffic court when he gets a ticket because of Penny.
9
The Barbarian Sublimation is listed (or ranked) 9 on the list The Best Big Bang Theory Episodes of All Time
The Barbarian Sublimation October 6, 2008

Season 2, Episode 3

Sheldon creates a monster when he introduces Penny to online gaming.
10
The Cruciferous Vegetable Ampl... is listed (or ranked) 10 on the list The Best Big Bang Theory Episodes of All Time
The Cruciferous Vegetable Amplification September 30, 2010

Season 4. Episode 2

Realizing he will not live long enough to download his consciousness into a robot body, Sheldon tries to extend his life span.
11
The Werewolf Transformation is listed (or ranked) 11 on the list The Best Big Bang Theory Episodes of All Time
The Werewolf Transformation February 23, 2012

Season 5. Episode 18

Sheldon becomes agitated when his regular barber is out sick. Astronaut training causes Howard to reconsider wanting to go into space. Penny beats Leonard in chess, the first time she plays.
12
The Love Car Displacement is listed (or ranked) 12 on the list The Best Big Bang Theory Episodes of All Time
The Love Car Displacement January 20, 2011

Season 4. Episode 13

Bernadette runs into her ex-boyfriend while attending a science event with Wolowitz.
13
The Zazzy Substitution is listed (or ranked) 13 on the list The Best Big Bang Theory Episodes of All Time
The Zazzy Substitution October 7, 2010

Season 4. Episode 3

The guys are concerned as Sheldon searches for an alternative to human companionship.
14
The Dumpling Paradox is listed (or ranked) 14 on the list The Best Big Bang Theory Episodes of All Time
November 5, 2007

Season 1, Episode 7

With Wolowitz AWOL with one of her friends, Penny's recruited to fill in for him on the guys' Halo team
15
The Zarnecki Incursion is listed (or ranked) 15 on the list The Best Big Bang Theory Episodes of All Time
The Zarnecki Incursion March 31, 2011

Season 4. Episode 19

Sheldon's World of Warcraft online game account is hacked and he is determined to find out who did it. Also Penny shares some girl talk with her friends about Leonard and his new girlfriend. ...more
16
The Vengeance Formulation is listed (or ranked) 16 on the list The Best Big Bang Theory Episodes of All Time
The Vengeance Formulation November 23, 2009

Season 3, Episode 9

After he's humiliated on National Public Radio, Sheldon vows to destroy Kripke, while Wolowitz tries not to destroy his new relationship with Bernadette.
17
The Precious Fragmentation is listed (or ranked) 17 on the list The Best Big Bang Theory Episodes of All Time
The Precious Fragmentation March 8, 2010

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.
18
The Maternal Congruence is listed (or ranked) 18 on the list The Best Big Bang Theory Episodes of All Time
December 14, 2009

Season 3, Episode 11

A Christmas visit from his mother has Leonard discovering she's kept a lot of news from him that she shares with Sheldon and worrying if she'll approve of his romance with Penny.
19
The Pork Chop Indeterminacy is listed (or ranked) 19 on the list The Best Big Bang Theory Episodes of All Time
May 5, 2008

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.
20
The Cooper-Nowitzki Theorem is listed (or ranked) 20 on the list The Best Big Bang Theory Episodes of All Time
The Cooper-Nowitzki Theorem November 3, 2008

Season 2, Episode 6

Sheldon and the gang are confused when a young grad student is attracted to him.
21
The Adhesive Duck Deficiency is listed (or ranked) 21 on the list The Best Big Bang Theory Episodes of All Time
The Adhesive Duck Deficiency November 16, 2009

Season 3, Episode 8

With Leonard, Howard and Raj away camping in the desert, an injured Penny has only Sheldon to rely on.
22
The Gorilla Experiment is listed (or ranked) 22 on the list The Best Big Bang Theory Episodes of All Time
The Gorilla Experiment December 7, 2009

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.
23
The Bakersfield Expedition is listed (or ranked) 23 on the list The Best Big Bang Theory Episodes of All Time
The Bakersfield Expedition January 10, 2013

Season 6, Episode 13

As the guys don costumes and go on a road trip to a comic book convention, the ladies decide to stay home and try to interpret a comic book.
24
The Flaming Spittoon Acquisiti... is listed (or ranked) 24 on the list The Best Big Bang Theory Episodes of All Time
The Flaming Spittoon Acquisition November 17, 2011

Season 5. Episode 10

Sheldon considers taking his relationship with Amy to the next level when Stuart from the comic book store asks her out on a date.
25
The Vegas Renormalization is listed (or ranked) 25 on the list The Best Big Bang Theory Episodes of All Time
The Vegas Renormalization April 27, 2009

Season 2, Episode 21

Leonard and Koothrappali escort a heartbroken Wolowitz to Las Vegas, and Sheldon becomes locked out of his apartment and must stay with Penny.