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The Best Big Bang Theory Episodes of All Time 

Ranker TV
Updated November 27, 2019 2.8k votes 288 voters 9.1k 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.

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list ordered by
1
The Staircase Implementa... is listed (or ranked) 1 on the list The Best Big Bang Theory Episodes of All Time
The Staircase Implementation Episode: 22, Season: The Big Bang Theory - Season 3

Original Airing: 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 Hypot... is listed (or ranked) 2 on the list The Best Big Bang Theory Episodes of All Time
The Bath Item Gift Hypothesis Episode: 11, Season: The Big Bang Theory - Season 2

Original Airing: 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 ... is listed (or ranked) 3 on the list The Best Big Bang Theory Episodes of All Time
Episode: 7, Season: The Big Bang Theory - Season 2

Original Airing: November 10, 2008

Season 2, Episode 7

When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate.
4
The Einstein Approximati... is listed (or ranked) 4 on the list The Best Big Bang Theory Episodes of All Time
Episode: 14, Season: The Big Bang Theory - Season 3

Original Airing: 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.
5
The Justice League Recom... is listed (or ranked) 5 on the list The Best Big Bang Theory Episodes of All Time
Episode: 11, Season: The Big Bang Theory - Season 4

Original Airing: 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.
6
The Euclid Alternative ... is listed (or ranked) 6 on the list The Best Big Bang Theory Episodes of All Time
Episode: 5, Season: The Big Bang Theory - Season 2

Original Airing: 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 Cruciferous Vegetabl... is listed (or ranked) 7 on the list The Best Big Bang Theory Episodes of All Time
The Cruciferous Vegetable Amplification Episode: 2, Season: The Big Bang Theory - Season 4

Original Airing: 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.
8
The Excelsior Acquisitio... is listed (or ranked) 8 on the list The Best Big Bang Theory Episodes of All Time
The Excelsior Acquisition Episode: 16, Season: The Big Bang Theory - Season 3

Original Airing: March 1, 2010

Season 3, Episode 16

Sheldon winds up in traffic court when he gets a ticket because of Penny.
9
The Middle Earth Paradig... is listed (or ranked) 9 on the list The Best Big Bang Theory Episodes of All Time
Episode: 6, Season: The Big Bang Theory - Season 1

Original Airing: 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.
10
The Love Car Displacemen... is listed (or ranked) 10 on the list The Best Big Bang Theory Episodes of All Time
The Love Car Displacement Episode: 13, Season: The Big Bang Theory - Season 4

Original Airing: January 20, 2011

Season 4. Episode 13

Bernadette runs into her ex-boyfriend while attending a science event with Wolowitz.
11
The Barbarian Sublimatio... is listed (or ranked) 11 on the list The Best Big Bang Theory Episodes of All Time
The Barbarian Sublimation Episode: 3, Season: The Big Bang Theory - Season 2

Original Airing: October 6, 2008

Season 2, Episode 3

Sheldon creates a monster when he introduces Penny to online gaming.
12
The Werewolf Transformat... is listed (or ranked) 12 on the list The Best Big Bang Theory Episodes of All Time
The Werewolf Transformation Episode: 18, Season: The Big Bang Theory - Season 5

Original Airing: 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.
13
The Dumpling Paradox is listed (or ranked) 13 on the list The Best Big Bang Theory Episodes of All Time
Episode: 7, Season: The Big Bang Theory - Season 1

Original Airing: 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
14
The Zarnecki Incursion ... is listed (or ranked) 14 on the list The Best Big Bang Theory Episodes of All Time
The Zarnecki Incursion Episode: 19, Season: The Big Bang Theory - Season 4

Original Airing: 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
15
The Vengeance Formulatio... is listed (or ranked) 15 on the list The Best Big Bang Theory Episodes of All Time
The Vengeance Formulation Episode: 9, Season: The Big Bang Theory - Season 3

Original Airing: 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.
16
The Maternal Congruence ... is listed (or ranked) 16 on the list The Best Big Bang Theory Episodes of All Time
Episode: 11, Season: The Big Bang Theory - Season 3

Original Airing: 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.
17
The Zazzy Substitution ... is listed (or ranked) 17 on the list The Best Big Bang Theory Episodes of All Time
The Zazzy Substitution Episode: 3, Season: The Big Bang Theory - Season 4

Original Airing: October 7, 2010

Season 4. Episode 3

The guys are concerned as Sheldon searches for an alternative to human companionship.
18
The Precious Fragmentati... is listed (or ranked) 18 on the list The Best Big Bang Theory Episodes of All Time
The Precious Fragmentation Episode: 17, Season: The Big Bang Theory - Season 3

Original Airing: 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.
19
The Flaming Spittoon Acq... is listed (or ranked) 19 on the list The Best Big Bang Theory Episodes of All Time
The Flaming Spittoon Acquisition Episode: 10, Season: The Big Bang Theory - Season 5

Original Airing: 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.
20
The Bozeman Reaction is listed (or ranked) 20 on the list The Best Big Bang Theory Episodes of All Time
The Bozeman Reaction Episode: 13, Season: The Big Bang Theory - Season 3

Original Airing: January 18, 2010

Season 3, Episode 13

When their apartment is robbed, Leonard and Sheldon turn to their friends to create a state-of-the-art security system.
21
The Vegas Renormalizatio... is listed (or ranked) 21 on the list The Best Big Bang Theory Episodes of All Time
The Vegas Renormalization Episode: 21, Season: The Big Bang Theory - Season 2

Original Airing: 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.
22
The Bat Jar Conjecture ... is listed (or ranked) 22 on the list The Best Big Bang Theory Episodes of All Time
Episode: 13, Season: The Big Bang Theory - Season 1

Original Airing: April 21, 2008

Season 1, Episode 13

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.
23
The Gothowitz Deviation ... is listed (or ranked) 23 on the list The Best Big Bang Theory Episodes of All Time
Erdner added The Gothowitz Deviation Episode: 3, Season: The Big Bang Theory - Season 3

Original Airing: October 5, 2009

Season 3, Episode 3

Howard and Raj visit a Goth nightclub to pick up women while Sheldon attempts to build a better Penny using chocolate-based behavior modification.
24
The Beta Test Initiation... is listed (or ranked) 24 on the list The Best Big Bang Theory Episodes of All Time
Episode: 14, Season: The Big Bang Theory - Season 5

Original Airing: January 26, 2012

Season 5. Episode 14

"The Beta Test Initiation" is the fourteenth episode of the fifth season of the sitcom The Big Bang Theory. The episode premiered on January 26, 2012 in the United States on CBS. In ...more
25
The Re-Entry Minimizatio... is listed (or ranked) 25 on the list The Best Big Bang Theory Episodes of All Time
Episode: 4, Season: The Big Bang Theory - Season 6

Original Airing: October 18, 2012

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.