CBS The Best Big Bang Theory Episodes of All Time  

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966 votes 143 voters 6.5k views 51 items

List of the best Big Bang Theory episodes, as voted on by other fans of the series. The Big Bang Theory is a popular American sitcom running on CBS. The show has 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 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 is the best Big Bang episode of all time? Look below and find out.
list ordered by

1
44 12
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 Leonard tells Penny about how he met Sheldon for the first time...and what happened to the elevator.

2
43 12
The Einstein Approximation is listed (or ranked) 2 on the list The Best Big Bang Theory Episodes of All Time
The Einstein Approximation Feb 01 2010 Sheldon's search for the answer to a physics problem leads him to work at the Cheesecake Factory with Penny.

3
37 9
The Cruciferous Vegetable Ampl... is listed (or ranked) 3 on the list The Best Big Bang Theory Episodes of All Time
The Cruciferous Vegetable Amplification Sep 30 2010 Realizing he will not live long enough to download his consciousness into a robot body, Sheldon tries to extend his life span.

4
41 12
The Panty Piñata Polarization is listed (or ranked) 4 on the list The Best Big Bang Theory Episodes of All Time
The Panty Piñata Polarization Nov 10 2008 When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate.

5
31 7
The Love Car Displacement is listed (or ranked) 5 on the list The Best Big Bang Theory Episodes of All Time
The Love Car Displacement Jan 20 2011 Bernadette runs into her ex-boyfriend while attending a science event with Wolowitz.

6
25 5
The Euclid Alternative is listed (or ranked) 6 on the list The Best Big Bang Theory Episodes of All Time
The Euclid Alternative Oct 20 2008 Leonard and his friends stage an intervention to force Sheldon to face his fear of driving.

7
17 2
The Barbarian Sublimation is listed (or ranked) 7 on the list The Best Big Bang Theory Episodes of All Time
The Barbarian Sublimation Oct 06 2008 Sheldon creates a monster when he introduces Penny to online gaming.

8
20 3
The Middle Earth Paradigm is listed (or ranked) 8 on the list The Best Big Bang Theory Episodes of All Time
The Middle Earth Paradigm Oct 29 2007 Penny hosts a Hallowe'en party, putting Leonard, Sheldon, Wolowitz, and Koothrappali through a new test of their social skills.

9
26 8
The Justice League Recombinati... is listed (or ranked) 9 on the list The Best Big Bang Theory Episodes of All Time
The Justice League Recombination Dec 16 2010 The guys find a "super" use for Penny's new boyfriend, Zack, when they enter a costume contest as the Justice League.

10
21 4
The Dumpling Paradox is listed (or ranked) 10 on the list The Best Big Bang Theory Episodes of All Time
The Dumpling Paradox Nov 05 2007 With Wolowitz AWOL with one of her friends, Penny's recruited to fill in for him on the guys' Halo team

11
22 6
The Bath Item Gift Hypothesis is listed (or ranked) 11 on the list The Best Big Bang Theory Episodes of All Time
The Bath Item Gift Hypothesis Dec 15 2008 Penny starts dating Leonard's handsome colleague; Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.

12
22 6
The Maternal Congruence is listed (or ranked) 12 on the list The Best Big Bang Theory Episodes of All Time
The Maternal Congruence Dec 14 2009 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.

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13
25 9
The Excelsior Acquisition is listed (or ranked) 13 on the list The Best Big Bang Theory Episodes of All Time
The Excelsior Acquisition Mar 01 2010 Sheldon winds up in traffic court when he gets a ticket because of Penny.

14
24 10
The Werewolf Transformation is listed (or ranked) 14 on the list The Best Big Bang Theory Episodes of All Time
The Werewolf Transformation Feb 23 2012 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.

15
16 4
The Precious Fragmentation is listed (or ranked) 15 on the list The Best Big Bang Theory Episodes of All Time
The Precious Fragmentation Mar 08 2010 When the guys find a ring from "The Lord of the Rings" at a garage sale, it threatens to tear them apart.

16
20 8
The Flaming Spittoon Acquisiti... is listed (or ranked) 16 on the list The Best Big Bang Theory Episodes of All Time
The Flaming Spittoon Acquisition Nov 17 2011 Sheldon considers taking his relationship with Amy to the next level when Stuart from the comic book store asks her out on a date.

17
13 2
The Hot Troll Deviation is listed (or ranked) 17 on the list The Best Big Bang Theory Episodes of All Time
The Hot Troll Deviation Oct 14 2010 An embarrassing secret of Wolowitz's comes to light, while Sheldon and Raj have a small war at work.

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18
14 4
The Vengeance Formulation is listed (or ranked) 18 on the list The Best Big Bang Theory Episodes of All Time
The Vengeance Formulation Nov 23 2009 After he's humiliated on National Public Radio, Sheldon vows to destroy Kripke, while Wolowitz tries not to destroy his new relationship with Bernadette.

19
13 4
The Love Spell Potential is listed (or ranked) 19 on the list The Best Big Bang Theory Episodes of All Time
The Love Spell Potential May 09 2013 Amy and Sheldon's relationship takes a surprising turn during a game of "Dungeons & Dragons"; Lucy and Koothrappali have an awkward date.

20
14 5
The Zarnecki Incursion is listed (or ranked) 20 on the list The Best Big Bang Theory Episodes of All Time
The Zarnecki Incursion Mar 31 2011 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

21
15 7
The Bat Jar Conjecture is listed (or ranked) 21 on the list The Best Big Bang Theory Episodes of All Time
The Bat Jar Conjecture Apr 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.

22
8 1
The Apology Insufficiency is listed (or ranked) 22 on the list The Best Big Bang Theory Episodes of All Time
The Apology Insufficiency Nov 04 2010 Sheldon's answers during an FBI interview put Wolowitz's security clearance in jeopardy.

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23
10 3
The Electric Can Opener Fluctu... is listed (or ranked) 23 on the list The Best Big Bang Theory Episodes of All Time
The Electric Can Opener Fluctuation Sep 21 2009 When Sheldon learns the guys tampered with his expedition data he got from the arctic, he leaves to Texas in disgrace. This results in the guys following him, which threatens Leonard's hope for ...more

24
10 3
The Plimpton Stimulation is listed (or ranked) 24 on the list The Best Big Bang Theory Episodes of All Time
The Plimpton Stimulation May 10 2010 Leonard and Sheldon compete for the attention of a famous female physicist.

25
12 5
The Beta Test Initiation is listed (or ranked) 25 on the list The Best Big Bang Theory Episodes of All Time
The Beta Test Initiation Jan 26 2012 "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

26
8 2
The 21-second Excitation is listed (or ranked) 26 on the list The Best Big Bang Theory Episodes of All Time
The 21-second Excitation Nov 11 2010 While the guys camp in line for a long-awaited movie screening, Penny and Bernadette invite Amy to her first slumber party.

27
8 2
The Vegas Renormalization is listed (or ranked) 27 on the list The Best Big Bang Theory Episodes of All Time
The Vegas Renormalization Apr 27 2009 Leonard and Koothrappali escort a heartbroken Wolowitz to Las Vegas, and Sheldon becomes locked out of his apartment and must stay with Penny.

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28
9 3
The Creepy Candy Coating Corol... is listed (or ranked) 28 on the list The Best Big Bang Theory Episodes of All Time
The Creepy Candy Coating Corollary Oct 19 2009 After overhearing that Wil Wheaton is entering a trading-card competition, Sheldon decides to enter it himself. Meanwhile, Penny sets up one of her friends on a date with Wolowitz.

29
9 3
The Cooper-Hofstadter Polariza... is listed (or ranked) 29 on the list The Best Big Bang Theory Episodes of All Time
The Cooper-Hofstadter Polarization Mar 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

30
9 3
The Bozeman Reaction is listed (or ranked) 30 on the list The Best Big Bang Theory Episodes of All Time
The Bozeman Reaction Jan 18 2010 When their apartment is robbed, Leonard and Sheldon turn to their friends to create a state-of-the-art security system.

31
11 5
The Zazzy Substitution is listed (or ranked) 31 on the list The Best Big Bang Theory Episodes of All Time
The Zazzy Substitution Oct 07 2010 The guys are concerned as Sheldon searches for an alternative to human companionship.

32
7 2
The Hofstadter Isotope is listed (or ranked) 32 on the list The Best Big Bang Theory Episodes of All Time
The Hofstadter Isotope Apr 13 2009 A fellow comic book enthusiast's hitting on Penny leads to Leonard and Howard going to a bar's Ladies' Night.

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33
9 4
The Decoupling Fluctuation is listed (or ranked) 33 on the list The Best Big Bang Theory Episodes of All Time
The Decoupling Fluctuation Oct 04 2012 When Sheldon learns that Penny is thinking about breaking up with Leonard, he tries to intervene. Meanwhile, in space, the other astronauts pick on Howard.

34
7 2
The Infestation Hypothesis is listed (or ranked) 34 on the list The Best Big Bang Theory Episodes of All Time
The Infestation Hypothesis Sep 22 2011 A fight between Sheldon and Penny leaves Amy caught in the middle, while Leonard tries to spice up his long-distance relationship with Priya.

35
10 5
The Pancake Batter Anomaly is listed (or ranked) 35 on the list The Best Big Bang Theory Episodes of All Time
The Pancake Batter Anomaly Mar 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.

36
8 4
The Benefactor Factor is listed (or ranked) 36 on the list The Best Big Bang Theory Episodes of All Time
The Benefactor Factor Feb 10 2011 A wealthy donor to the university makes Leonard consider how far he's willing to go for the sake of science.

37
7 3
The Re-Entry Minimization is listed (or ranked) 37 on the list The Best Big Bang Theory Episodes of All Time
The Re-Entry Minimization Oct 18 2012 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.

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38
6 2
The Thespian Catalyst is listed (or ranked) 38 on the list The Best Big Bang Theory Episodes of All Time
The Thespian Catalyst Feb 03 2011 Hoping it will make him a better teacher, Sheldon has Penny give him acting lessons. Raj has fantasies about a friend's girlfriend.

39
6 2
The Grasshopper Experiment is listed (or ranked) 39 on the list The Best Big Bang Theory Episodes of All Time
The Grasshopper Experiment Nov 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.

40
6 2
The Hamburger Postulate is listed (or ranked) 40 on the list The Best Big Bang Theory Episodes of All Time
The Hamburger Postulate Oct 22 2007 Fearing he's wasting his time on Penny, Leonard ends up making a connection with Leslie.

41
9 6
The Pirate Solution is listed (or ranked) 41 on the list The Best Big Bang Theory Episodes of All Time
The Pirate Solution Oct 12 2009 Raj must find a new job or be sent back to India, but Sheldon has a solution, which leaves Leonard and Penny dealing with Howard as a third wheel.

42
5 2
The Gothowitz Deviation is listed (or ranked) 42 on the list The Best Big Bang Theory Episodes of All Time
Erdner added The Gothowitz Deviation Oct 05 2009 Howard and Raj visit a Goth nightclub to pick up women while Sheldon attempts to build a better Penny using chocolate-based behavior modification.

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43
7 5
The Irish Pub Formulation is listed (or ranked) 43 on the list The Best Big Bang Theory Episodes of All Time
The Irish Pub Formulation Oct 28 2010 Leonard keeps an affair a secret from Sheldon, Howard and Raj.

44
6 4
The Large Hadron Collision is listed (or ranked) 44 on the list The Best Big Bang Theory Episodes of All Time
The Large Hadron Collision Feb 08 2010 Leonard can only bring one guest on a trip to see CERN's Large Hadron Collider (the world's largest and highest energy particle accelerator) in Switzerland on Valentine's Day.

45
5 4
The Desperation Emanation is listed (or ranked) 45 on the list The Best Big Bang Theory Episodes of All Time
The Desperation Emanation Oct 21 2010 Leonard realizes he’s the only one without a girlfriend, while Sheldon wants to get rid of his.

46
5 5
The Countdown Reflection is listed (or ranked) 46 on the list The Best Big Bang Theory Episodes of All Time
The Countdown Reflection May 10 2012 Wolowitz makes his final preparations to launch into space

47
5 5
The Transporter Malfunction is listed (or ranked) 47 on the list The Best Big Bang Theory Episodes of All Time
The Transporter Malfunction Mar 29 2012 Penny buys Leonard and Sheldon “Star Trek” collectibles as a thank-you, leading Sheldon to be haunted by Mr. Spock. Meanwhile, Raj decides he has met the “Future Mrs. Koothrappali” after his ...more

48
5 5
The Russian Rocket Reaction is listed (or ranked) 48 on the list The Best Big Bang Theory Episodes of All Time
The Russian Rocket Reaction Oct 13 2011 Sheldon and Leonard get invited to a party at Wil Wheaton's house, and Howard gets an out-of-this-world opportunity.

49
4 4
The Extract Obliteration is listed (or ranked) 49 on the list The Best Big Bang Theory Episodes of All Time
The Extract Obliteration Nov 01 2012 Sheldon’s relationship with Stephen Hawking is threatened over a game of “Words with Friends,” and Penny secretly enrolls in a class at the local college.

50
4 6
The Boyfriend Complexity is listed (or ranked) 50 on the list The Best Big Bang Theory Episodes of All Time
The Boyfriend Complexity Nov 18 2010 Penny asks Leonard to lie to her father, while Howard, Raj and Bernadette pull an all-nighter at a telescope.