The Big Bang Theory

10 Best Episodes of The Big Bang Theory

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 showโ€™s long run, itโ€™s no surprise that it has featured some truly outstanding episodes over the years. In this article, weโ€™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 jun 16, 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 - S5E23

#15 - The Launch Acceleration (Season 5 - Episode 23)

In the episode "The Launch Acceleration" of The Big Bang Theory, Howard Wolowitz's mission to space is moved up by NASA, and Howard must now face his fears and Bernie's dad while their wedding plans are put in jeopardy. While this is happening, Leonard says something unexpected to Penny in the bedroom. This episode is sure to be an emotional rollercoaster for the characters and the audience.

The episode will likely focus on Howard's character arc as he deals with his fears and his future father-in-law. We can also expect to see the tension between Leonard and Penny as Leonard reveals his surprising comment. Emotions will run high as the characters deal with their issues, and Howard's mission to space hangs in the balance. Will Howard be able to overcome his fears and launch into space, or will he remain grounded? Will the wedding plans stay on track, or will they be derailed?

The episode was rated 8.20 from 2891 votes.

The Big Bang Theory - S6E23

#14 - The Love Spell Potential (Season 6 - Episode 23)


The episode of The Big Bang Theory titled "The Love Spell Potential" focuses on Amy and Sheldon's relationship, as well as Lucy and Koothrappali's awkward date. In the episode, the group plays a game of Dungeons & Dragons, which leads to a surprising new development in Amy and Sheldon's relationship.

Viewers were excited to see the group playing Dungeons & Dragons, with many commenting on Howard's amazing effects and the others' voices. However, some viewers felt that Penny ruined the game from the beginning, as they felt she was trying to get the others to engage in activities she enjoyed, without putting in the effort to understand them. The episode was filled with surprises and excitement, ultimately leading to a new development in Amy and Sheldon's relationship.

The episode was rated 8.21 from 3949 votes.

The Big Bang Theory - S6E21

#13 - The Closure Alternative (Season 6 - Episode 21)

In the Big Bang Theory episode "The Closure Alternative," Sheldon's favorite TV show is unexpectedly canceled, leaving him with an unresolved feeling of incompleteness. After much prodding from his friends, Sheldon finally turns to Amy for help in finding closure. She tries to help him find closure by suggesting that he rewatch the series finale, as that would provide him with a sense of finality. Unfortunately, Sheldon's compulsive need for closure leads him to search for alternative endings, which only aggravates him further.

Meanwhile, Raj discovers a secret about Lucy that throws a wrench in his plans. He had been planning to ask her out, but now must consider the possibility that she may not be single. Raj is left to decide whether to confront Lucy about her secret or leave it alone and move on. Ultimately, Raj chooses to leave it be, as he is not sure if he really wants to know the truth. In the end, the episode serves as a reminder to embrace the little moments in life and realize that some things don't need closure.

The episode was rated 8.21 from 3960 votes.

The Big Bang Theory - S5E14

#12 - The Beta Test Initiation (Season 5 - Episode 14)


In the episode "The Beta Test Initiation" of The Big Bang Theory, Leonard and Penny contemplate the possibility of starting their relationship again. Raj finds someone he can talk to without having to be drunk, and Sheldon enlists Amy's help to launch a YouTube series entitled "Sheldon Cooper presents Fun with Flags".

This episode is full of hilarious moments, especially when Sheldon starts his new YouTube series. People were so delighted with this scene that many suggested that the show should do couple specials only for this part. The Big Bang Theory continues to be a hit show, delivering laughs and heartfelt moments in every episode.

The episode was rated 8.21 from 2893 votes.

The Big Bang Theory - S7E6

#11 - The Romance Resonance (Season 7 - Episode 6)

In The Big Bang Theory's episode "The Romance Resonance", Sheldon's latest scientific breakthrough brings him a mixture of emotions, causing him to question his own worth and feel like a fraud. Meanwhile, Howard's romantic gesture to Bernadette causes Penny to make her own effort to up the ante with Leonard.

The episode was filled with surprisingly touching moments, such as Howard's heartfelt music he composed for Bernadette. The music was both funny and beautiful, and it is a testament to the show's writing that an audience can be moved to both laughter and tears in a single sitcom episode. This episode was a great example of how The Big Bang Theory can provide comedy as well as heartfelt moments.

The episode was rated 8.22 from 4934 votes.

The Big Bang Theory - S5E21

#10 - The Hawking Excitation (Season 5 - Episode 21)


In this episode of The Big Bang Theory, Wolowitz gets the chance of a lifetime to collaborate with the renowned Stephen Hawking. Sheldon, being an admirer of Hawking, will do whatever it takes to meet his idol. Sheldon puts his dignity on the line and goes to extraordinary lengths to meet and impress Hawking, but ends up embarrassing himself.

This was a great episode of The Big Bang Theory and was a fitting tribute to the late Stephen Hawking. It was nice to see Hawking on the show and have the audience appreciate his brilliance. Even though Sheldon was embarrassed in the end, he still cherished the moment he had with Hawking and was able to follow through with his dream of meeting him. May Hawking Rest In Peace.

The episode was rated 8.22 from 2931 votes.

The Big Bang Theory - S7E3

#9 - The Scavenger Vortex (Season 7 - Episode 3)

The Big Bang Theory's episode "The Scavenger Vortex" is a classic episode and one of the fan favorites. The whole gang comes together to compete in a cutthroat scavenger hunt designed by Raj that tests their science knowledge and street smarts. This episode is a perfect example of what makes The Big Bang Theory great. It brings out the best and worst in everyone, creating a fun and entertaining atmosphere.

The episode also highlights the characters' individual qualities. Raj can now talk to women even when sober, which allows him to take part in social activities like the scavenger party or the murder mystery dinner. The competition between the gang is reminiscent of another popular CBS show, The Amazing Race. The Scavenger Vortex is an enjoyable episode that shows the gang having fun together and demonstrates how The Big Bang Theory always delivers in its unique and brilliant way.

The episode was rated 8.25 from 4987 votes.

The Big Bang Theory - S3E23

#8 - The Lunar Excitation (Season 3 - Episode 23)


In the episode "The Lunar Excitation" of The Big Bang Theory, Penny worries that dating Leonard has ruined her for other normal guys. In the meantime, Wolowitz and Koothrappali search for Sheldon's perfect match online. It turns out to be a match made in heaven!

The episode is a humorous take on the concept of relationships and how they can often take unexpected turns. Penny is afraid of the idea of being with Leonard because she's not sure if it's the right decision. Meanwhile, Wolowitz and Koothrappali try to find a suitable match for Sheldon, and they eventually find someone who is perfect for him.

The episode is a lighthearted look at relationships and how they can affect people's lives. It's a great way to show that love and relationships can be unpredictable, but that in the end, it's always worth the effort. It's a great episode to watch and it's sure to leave the viewers with a smile on their faces.

The episode was rated 8.26 from 2702 votes.

The Big Bang Theory - S5E7

#7 - The Good Guy Fluctuation (Season 5 - Episode 7)

In the episode "The Good Guy Fluctuation" of The Big Bang Theory, Leonard and Priya's relationship is put to the test when a cute comic book artist enters the picture. Meanwhile, Sheldon is determined to scare the guys for Halloween. The episode is full of laughs, including a hilarious moment when Sheldon shouts "Bazinga, punk! Now we're even!"

The Big Bang Theory has always been a show that is packed with comedic moments and this episode is no exception. It is no wonder why this episode is considered one of the best of this season so far. From Sheldon's mischievous attempts to scare the guys to Leonard and Priya's relationship woes, there is something for everyone to enjoy. Whether you are a fan of the show or just looking for a good laugh, this episode is sure to please.

The episode was rated 8.28 from 3195 votes.

The Big Bang Theory - S5E24

#6 - The Countdown Reflection (Season 5 - Episode 24)


The Big Bang Theory's episode "The Countdown Reflection" follows Howard as his mission to space is quickly approaching. In order to not leave without being married, he and Bernadette decide to get married before his launch. Their sudden decision causes the gang to scramble in order to arrange the wedding in time. The entire gang works together to make the day special for the couple, making sure nothing is left out.

At the end of the episode, the finally married couple is surrounded by their closest friends. In a sweet moment, they all hold hands as they reflect on the special event. It was a perfect way to end the episode, showing that even when rushed, something beautiful can still come out of it.

The episode was rated 8.30 from 2906 votes.

The Big Bang Theory - S4E24

#5 - The Roommate Transmogrification (Season 4 - Episode 24)

In this episode of The Big Bang Theory, Bernadette receives her PhD, which leads to Wolowitz feeling emasculated. In order to cheer him up, Raj and Leonard decide to switch apartments. This leads to a number of surprising events, including Penny doing something she regrets.

The viewers were pleasantly surprised by the events that unfolded in this episode. Raj finally got some love, and Bernadette and Priya were able to put their respective men in their places. This episode of The Big Bang Theory was definitely an enjoyable and fun watch.

The episode was rated 8.30 from 2726 votes.

The Big Bang Theory - S12E23

#4 - 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 - S7E9

#3 - The Thanksgiving Decoupling (Season 7 - Episode 9)

In The Big Bang Theory episode "The Thanksgiving Decoupling," the entire gang drags an upset Sheldon to Mrs. Wolowitz's house for Thanksgiving. Meanwhile, Penny and Leonard must deal with a mistake from her past. This episode is often cited as one of the funniest of the entire series. It includes the hilarious marriage plot between Penny and Zack and the comical character of Brian Smith. To top it off, viewers get to see Sheldon in an uninhibited, intoxicated state, spouting things he would not normally say.

However, some viewers are not entirely satisfied with this episode. The marriage plot between Penny and Zack is questioned, as going to a Vegas wedding chapel does not make you legally married. It is simply a ceremony that does not hold any legal value. Additionally, some viewers argue that shows like Seinfeld, FRIENDS, and HIMYM are superior to The Big Bang Theory.

The episode was rated 8.33 from 4911 votes.

The Big Bang Theory - S2E11

#2 - The Bath Item Gift Hypothesis (Season 2 - Episode 11)


The Big Bang Theory's episode "The Bath Item Gift Hypothesis" features Leonard's handsome colleague, Stuart, and Penny dating. This sends Leonard into a state of shock, which only worsens as Sheldon's obsession with gift-giving etiquette is revealed. Leonard and his friends are tortured as Sheldon insists that they must follow the proper gift-giving protocols and etiquette.

The episode is filled with hilarious moments, and is truly a "saturnalia miracle," as the comment says. It is full of comedic moments, as Leonard and his friends struggle to keep up with Sheldon's quirky rules and regulations. The episode leaves viewers with delight, as they see these characters navigate the complexities of friendship and gift-giving.

The episode was rated 8.38 from 3055 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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