The Big Bang Theory

10 Best Episodes of The Big Bang Theory - Season 9

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 - S9E14

#15 - The Meemaw Materialization (Season 9 - Episode 14)

Sheldon is thrilled when his Meemaw comes to visit, but his excitement quickly fades when she butts heads with Amy. Also, Raj meets a new girl at the comic book store who makes him question his relationship with Emily.

The episode was rated 7.63 from 6686 votes.

The Big Bang Theory - S9E23

#14 - The Line Substitution Solution (Season 9 - Episode 23)


Sheldon hires Stuart to spend the day with Amy when he’d rather go to a movie screening. Also, Leonard’s mother, Beverly, comes to town and Penny struggles to make a connection with her.

The episode was rated 7.63 from 7773 votes.

The Big Bang Theory - S9E13

#13 - The Empathy Optimization (Season 9 - Episode 13)

The gang decides to head to Vegas for the week on a party bus. Sheldon learns about the importance of empathy and saying sorry.

The episode was rated 7.63 from 6549 votes.

The Big Bang Theory - S9E7

#12 - The Spock Resonance (Season 9 - Episode 7)


Adam Nimoy, friend of Wil Wheaton and son of Leonard Nimoy, interviews Sheldon for a "Star Trek" documentary, but Sheldon goes off topic and has trouble suppressing his emotions about his recent break-up from Amy. Bernadette wants to start renovating the house and the issue of starting a family with Howard is brought up.

The episode was rated 7.63 from 6279 votes.

The Big Bang Theory - S9E20

#11 - The Big Bear Precipitation (Season 9 - Episode 20)

Secrets are revealed when Amy and Sheldon join Penny and Leonard on a weekend cabin trip. Raj is more excited about Howard's and Bernadette's impending parenthood than they are.

The episode was rated 7.64 from 7765 votes.

The Big Bang Theory - S9E19

#10 - The Solder Excursion Diversion (Season 9 - Episode 19)


Amy is shocked at a revelation from Sheldon after she buys him a new laptop. Koothrappali sells out Leonard and Wolowitz after they lie to their wives in order to attend an early screening of a movie.

The episode was rated 7.64 from 7385 votes.

The Big Bang Theory - S9E3

#9 - The Bachelor Party Corrosion (Season 9 - Episode 3)

The guys’ science skills are put to the test when they get a flat tire during Leonard’s bachelor party weekend in Mexico. Also, the girls force Penny to finally tell her family that she eloped with Leonard.

The episode was rated 7.66 from 6485 votes.

The Big Bang Theory - S9E22

#8 - The Fermentation Bifurcation (Season 9 - Episode 22)


Sheldon and Bernadette spend a night together while the rest of the gang goes to a wine tasting party, but things get uncomfortable for Raj when Zack also attends and takes an interest in Claire.

The episode was rated 7.66 from 7905 votes.

The Big Bang Theory - S9E18

#7 - The Application Deterioration (Season 9 - Episode 18)

Sheldon works up a contract to split their portion of their guidance system invention royalties, but Bernadette does not like how it's done. Raj must again decide between Emily and Claire when they both contact him.

The episode was rated 7.68 from 6696 votes.

The Big Bang Theory - S9E9

#6 - The Platonic Permutation (Season 9 - Episode 9)


It’s Thanksgiving. Sheldon and Amy go on a lunch date to the aquarium as friends. Meanwhile, Howard, Bernadette, Raj and Emily help out at a soup kitchen and Leonard and Penny make their first Thanksgiving dinner as a married couple.

The episode was rated 7.69 from 6397 votes.

The Big Bang Theory - S9E8

#5 - The Mystery Date Observation (Season 9 - Episode 8)

Amy has a formal date which Leonard, Penny and Bernadette secretly spy on. Sheldon has Howard and Raj help him find a new girlfriend since they found Amy for him.

The episode was rated 7.69 from 6269 votes.

The Big Bang Theory - S9E16

#4 - The Positive Negative Reaction (Season 9 - Episode 16)


When the gang finds out about Bernadette's pregnancy, they celebrate by singing karaoke. Also, Bernadette is concerned when Wolowitz freaks out over her pregnancy announcement, and Wolowitz is convinced he must make more money to provide for a baby.

The episode was rated 7.71 from 6893 votes.

The Big Bang Theory - S9E24

#3 - The Convergence Convergence (Season 9 - Episode 24)

Leonard and Penny get remarried in front of their friends, Leonard's parents, Beverly and Alfred and Sheldon's mother, Mary, who finds something in common with Alfred. Howard gets an unknown email from the Air Force about his invention.

The episode was rated 7.79 from 8111 votes.

The Big Bang Theory - S9E10

#2 - The Earworm Reverberation (Season 9 - Episode 10)


Sheldon has a revelation when he realizes why a song was stuck in his head. Also, Amy invites Dave over for dinner despite their previously awkward date, and Wolowitz and Koothrappali become obsessed with a fan of their band, "Footprints on the Moon."

The episode was rated 7.89 from 6486 votes.

The Big Bang Theory - S9E11

#1 - The Opening Night Excitation (Season 9 - Episode 11)

The Big Bang Theory's episode "The Opening Night Excitation" was a fan favorite, and for good reason. The episode followed two storylines, as the guys prepared to go to the premiere of the new Star Wars movie and Sheldon planned a special event for Amy's birthday. Fans praised the episode for being both funny and well balanced, with one comment noting that it was "the best episode of the season, by far." Amy's reaction in the stairwell was especially memorable, with viewers agreeing that it was "priceless." Furthermore, many agree that the episode is still one of the best in the show's history.

The episode was a classic, with both storylines providing ample comedic material. The anticipation of the premiere of the Star Wars movie was palpable, and the guys' attempt to one-up each other in terms of costume was hilarious. Meanwhile, Sheldon's plans to surprise Amy with a special event was full of comedic moments, as he got increasingly frustrated with her insistence that she didn't want a party. Overall, the episode was a perfect balance of both storylines, and a great example of why The Big Bang Theory is an iconic show.

The episode was rated 8.18 from 6896 votes.

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