The Big Bang Theory

10 Best Episodes of The Big Bang Theory - Season 2

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 - S2E8

#15 - The Lizard-Spock Expansion (Season 2 - Episode 8)

Leonard inadvertently steals away the new woman Wolowitz thinks is the love of his life.

The episode was rated 7.94 from 2867 votes.

The Big Bang Theory - S2E1

#14 - The Bad Fish Paradigm (Season 2 - Episode 1)


Penny's first date with Leonard goes awry; Penny finds Sheldon to be an unwilling confidant.

The episode was rated 7.95 from 3405 votes.

The Big Bang Theory - S2E5

#13 - The Euclid Alternative (Season 2 - Episode 5)

Leonard and his friends stage an intervention to force Sheldon to face his fear of driving.

The episode was rated 7.96 from 3011 votes.

The Big Bang Theory - S2E16

#12 - The Cushion Saturation (Season 2 - Episode 16)


A paintball game leads to a fight between Sheldon and Penny, and romance for Leslie and Wolowitz.

The episode was rated 7.98 from 2640 votes.

The Big Bang Theory - S2E9

#11 - The White Asparagus Triangulation (Season 2 - Episode 9)

Sheldon is thrilled when Leonard starts dating a woman who meets Sheldon's stringent standards.

The episode was rated 7.99 from 2829 votes.

The Big Bang Theory - S2E18

#10 - The Work Song Nanocluster (Season 2 - Episode 18)


Penny's home business turns into a complete nightmare when Sheldon takes over.

The episode was rated 7.99 from 2682 votes.

The Big Bang Theory - S2E19

#9 - The Dead Hooker Juxtaposition (Season 2 - Episode 19)

Penny squares off with a new beautiful female neighbor who may become the building's "new Penny."

The episode was rated 7.99 from 2620 votes.

The Big Bang Theory - S2E6

#8 - The Cooper-Nowitzki Theorem (Season 2 - Episode 6)


Sheldon and the gang are confused when a young grad student is attracted to him.

The episode was rated 8.02 from 2888 votes.

The Big Bang Theory - S2E21

#7 - The Vegas Renormalization (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.

The episode was rated 8.02 from 2609 votes.

The Big Bang Theory - S2E22

#6 - The Classified Materials Turbulence (Season 2 - Episode 22)


Penny's second date with Stuart sees her making a comment that gives Leonard new hope for a relationship with her. Wolowitz realizes there's a crucial error in a NASA project he's working on.

The episode was rated 8.04 from 2667 votes.

The Big Bang Theory - S2E23

#5 - The Monopolar Expedition (Season 2 - Episode 23)

The guys' plan to work over the summer at the North Pole makes Penny revaluate her feelings for Leonard.

The episode was rated 8.06 from 2587 votes.

The Big Bang Theory - S2E3

#4 - The Barbarian Sublimation (Season 2 - Episode 3)


Sheldon creates a monster when he introduces Penny to online gaming. Meanwhile, Sheldon disagrees with Leslie Winkle at work.

The episode was rated 8.08 from 3148 votes.

The Big Bang Theory - S2E15

#3 - The Maternal Capacitance (Season 2 - Episode 15)

Leonard and Penny are drawn together after a disastrous visit from Leonard's mother.

The episode was rated 8.11 from 2766 votes.

The Big Bang Theory - S2E7

#2 - The Panty Piñata Polarization (Season 2 - Episode 7)


When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate. Meanwhile, Howard and Rajesh try to find the house where all the models from "America's Top Model" are staying.

The episode was rated 8.11 from 3019 votes.

The Big Bang Theory - S2E11

#1 - 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.

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