The Big Bang Theory

10 Best Episodes of The Big Bang Theory - Season 12

The Big Bang Theory, which aired on CBS from 2007 to 2019, is one of the most popular sitcoms of all time. The show centers on five characters living in Pasadena, California and features the geekiness and intellect of Leonard Hofstadter, Sheldon Cooper, Howard Wolowitz and Raj Koothrappali contrasted with the common sense and social skills of Penny. With 13 seasons of content, fans have plenty of episodes to choose from. Here we will rank the best episodes of The Big Bang Theory and discuss why they are so popular.

The Big Bang Theory is renowned for its clever writing and witty dialogue. The show explores a variety of topics, ranging from relationships and romance to science and technology. It also features a number of recurring jokes and cultural references. All of these elements combine to make The Big Bang Theory an entertaining and memorable show.

Given the show’s long run, it’s no surprise that it has featured some truly outstanding episodes over the years. In this article, we’ll be taking a look at some of the best episodes of The Big Bang Theory and discussing why they are so highly ranked. From heartfelt moments to laugh-out-loud comedy, these episodes are sure to please any fan of the show.

Written by Sophie and last updated on jul 14, 2024.

PS: The following content contains spoilers!

PPS: I will admit that parts of this page was written with the help of AI - it makes my work so much easier to not start from a blank page!

The Big Bang Theory - S12E12

#15 - The Propagation Proposition (Season 12 - Episode 12)

Penny's ex-boyfriend, Zack, and his wife want a baby, but when Zack is infertile, they ask Leonard for help. Also, Koothrappali attempts to mend things with his ex-fiancée, Anu.

The episode was rated 7.53 from 3427 votes.

The Big Bang Theory - S12E9

#14 - The Citation Negation (Season 12 - Episode 9)


Sheldon and Amy are devastated after learning from a Russian paper that Super Asymmetry has already been discovered and disproven. Also, ultra-competitive Bernadette asks Stuart’s girlfriend, Denise, to teach her how to beat Howard in a popular videogame.

The episode was rated 7.54 from 3563 votes.

The Big Bang Theory - S12E3

#13 - The Procreation Calculation (Season 12 - Episode 3)

The Wolowitzes’ life gets complicated when Stuart starts bringing his new girlfriend home. Also, Penny and Leonard talk about starting a family while Koothrappali explores an arranged marriage.

The episode was rated 7.55 from 3843 votes.

The Big Bang Theory - S12E1

#12 - The Conjugal Configuration (Season 12 - Episode 1)


Sheldon and Amy’s honeymoon runs aground in New York, while Penny and Leonard discover they are uncomfortably similar to Amy’s parents, Mr. and Mrs. Fowler. Also, Koothrappali insults physicist Neil deGrasse Tyson and starts a Twitter war.

The episode was rated 7.56 from 4205 votes.

The Big Bang Theory - S12E11

#11 - The Paintball Scattering (Season 12 - Episode 11)

Penny and Leonard organize a paintball game that results in mayhem when Sheldon is jealous of Amy. Also, Koothrappali catches Anu with her ex-boyfriend, and Stuart doesn’t want to move in with Denise.

The episode was rated 7.57 from 3509 votes.

The Big Bang Theory - S12E7

#10 - The Grant Allocation Derivation (Season 12 - Episode 7)


Leonard is caught between a rock and a hard place when he’s responsible for distributing extra grant money. Also, Bernadette turns the backyard playhouse into a hideaway from her husband and kids.

The episode was rated 7.57 from 3639 votes.

The Big Bang Theory - S12E15

#9 - The Donation Oscillation (Season 12 - Episode 15)

Penny tries to seduce an abstaining Leonard to ruin his "donation" for her ex-boyfriend, Zack, and his wife, Marissa. Also, Wolowitz, Bernadette, Anu and Koothrappali turn Koothrappali's canceled bachelor party into a couple’s trip aboard the "vomit comet."

The episode was rated 7.60 from 3264 votes.

The Big Bang Theory - S12E8

#8 - The Consummation Deviation (Season 12 - Episode 8)


Sheldon tries to bond with Amy’s father, but when Wolowitz lures Mr. Fowler away with magic tricks, Sheldon has no choice but to bond with Mrs. Fowler. Also, Koothrappali and Anu try to get physical for the first time.

The episode was rated 7.61 from 3591 votes.

The Big Bang Theory - S12E16

#7 - The D & D Vortex (Season 12 - Episode 16)

The gang finds out Wil Wheaton hosts a celebrity Dungeons and Dragons game involving William Shatner, Joe Manganiello, Kareem Abdul-Jabbar and Kevin Smith. Deception and betrayal are the path to make it to the one open seat.

The episode was rated 7.65 from 3265 votes.

The Big Bang Theory - S12E22

#6 - The Maternal Conclusion (Season 12 - Episode 22)


Leonard is pleasantly surprised when Beverly comes to visit and she's genuinely kind to him, until he finds out the real reason she's there. Also, Denise and Stuart overstay their welcome at the Wolowitz house.

The episode was rated 7.65 from 3074 votes.

The Big Bang Theory - S12E10

#5 - The VCR Illumination (Season 12 - Episode 10)

Sheldon and Amy are still down about their theory being disproven, but a VHS tape from Sheldon’s past inspires him not to give up. Also, Bernadette turns into a pageant mom when she tries to help Wolowitz ace his Magic Castle audition.

The episode was rated 7.68 from 3540 votes.

The Big Bang Theory - S12E2

#4 - The Wedding Gift Wormhole (Season 12 - Episode 2)


Sheldon and Amy drive themselves crazy trying to figure out what “perfect gift” Leonard and Penny gave them for their wedding. Also, Koothrappali decides he wants to settle down and asks his father to arrange a marriage for him.

The episode was rated 7.68 from 4028 votes.

The Big Bang Theory - S12E6

#3 - The Imitation Perturbation (Season 12 - Episode 6)

When Wolowitz dresses up as Sheldon for Halloween, Sheldon seeks retaliation at Leonard and Penny’s Halloween party. Also, Leonard is shocked that Penny doesn’t remember their first kiss.

The episode was rated 7.80 from 3906 votes.

The Big Bang Theory - S12E23

#2 - The Change Constant (Season 12 - Episode 23)


In the episode "The Change Constant" of The Big Bang Theory, Sheldon and Amy are eagerly awaiting some big news. It was a powerful episode that made many viewers think about life and how much it can change over time. One viewer commented that the scene between Sheldon and Penny at the bar was especially thought provoking and really made her reflect on her own life.

The ending of the episode was especially powerful. From Sheldon's reaction to Penny's comforting words and the scene with the elevator, viewers were moved. One viewer commented that this was the best episode of the entire show and that they are hoping the season finale will be as good.

The episode was rated 8.32 from 3277 votes.

The Big Bang Theory - S12E24

#1 - The Stockholm Syndrome (Season 12 - Episode 24)

The Big Bang Theory's series finale, The Stockholm Syndrome, was a powerful and emotional episode that encapsulated the show's 12-season journey perfectly. The gang traveled together for one last time, as Bernadette and Wolowitz left their kids for the first time, Penny and Leonard tried to keep a secret, Sheldon and Amy stuck together, and Koothrappali made a new friend. Despite the fact that there were no guest stars, the episode still managed to tug at heartstrings and leave viewers with a sense of closure.

This finale was a true testament to the show's longevity and impact. After 12 amazing seasons, The Big Bang Theory still managed to surprise us with a genuinely funny and heartwarming episode. From Sheldon's Nobel Prize speech to the show's surprise Buffy the Vampire Slayer reference, the finale truly put a lot of heart into the series. Fans were truly moved by this episode, and with the show coming to an end, they will miss these characters and the laughter they provided.

The episode was rated 8.54 from 2611 votes.

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