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Season 2 - Best Episodes Of The Big Bang Theory

Overall Rating: ★ 8.1

Season 2 - Best Episodes Of The Big Bang Theory

(Overall Rating: ★ 8.1)

Episode Ratings & Analysis

Explore season 2 episodes of The Big Bang Theory. Explore detailed ratings, episode summaries, and visualize how the show's quality evolved over time.

Physicists Leonard and Sheldon find their nerd-centric social circle with pals Howard and Raj expanding when aspiring actress Penny moves in next door.

12 Seasons
279 Episodes
Ended
Comedy
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★ 9.1/10 (7467 votes)
#1

The Bath Item Gift Hypothesis

S2:E11

Penny starts dating Leonard's handsome colleague; Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.

leomovies Mar 31, 2016

its a saturnalia miracle. jajaja

★ 8.8/10 (5334 votes)
#2

The Maternal Capacitance

S2:E15

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

palharesf Jun 11, 2021

That was one of the funniest episodes of the show so far - Leonard's mom talking to Penny, Raj and H...

★ 8.7/10 (5414 votes)
#3

The Barbarian Sublimation

S2:E3

Sheldon creates a monster when he introduces Penny to online gaming.

★ 8.6/10 (5107 votes)
#4

The Panty Piñata Polarization

S2:E7

When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate.

palharesf May 28, 2021

The stuff with Howard and Raj - positively creepy

★ 8.4/10 (4678 votes)
#5

The Vegas Renormalization

S2:E21

Leonard and Koothrappali escort a heartbroken Wolowitz to Las Vegas, and Sheldon becomes locked out of his apartment and must stay with Penny.

saltervallos-deleted-1609330405 Aug 13, 2019

“Raj, there’s no place for truth on the internet.”

★ 8.3/10 (4813 votes)
#6

The Euclid Alternative

S2:E5

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

palharesf May 26, 2021

lol Sheldon's social ineptitude reached new levels here. It's fun to see him getting the worse of it...

★ 8.2/10 (5020 votes)
#7

The Bad Fish Paradigm

S2:E1

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

OM4R Jan 1, 2016

Is it that hard to keep a secret nowadays ?

★ 8.2/10 (4832 votes)
#8

The Cooper-Nowitzki Theorem

S2:E6

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

ejordz_2005 Oct 28, 2022

Poor Sheldon lol. He is a scientist but still wants to chill with his friends.

★ 8.2/10 (4418 votes)
#9

The Monopolar Expedition

S2:E23

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

★ 8.1/10 (4554 votes)
#10

The White Asparagus Triangulation

S2:E9

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

palharesf May 29, 2021

Sheldon at the movie theater - probably the funniest scene on the show so far

★ 8.1/10 (4451 votes)
#11

The Cushion Saturation

S2:E16

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

palharesf Jun 11, 2021

Sheldon sitting down is so funny 😂

★ 8.1/10 (4473 votes)
#12

The Work Song Nanocluster

S2:E18

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

★ 8.1/10 (4513 votes)
#13

The Dead Hooker Juxtaposition

S2:E19

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

palharesf Jun 14, 2021

It's a trap! 😁😂 Sheldon

★ 8.1/10 (4291 votes)
#14

The Classified Materials Turbulence

S2:E22

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.

rasslingrob7 Jan 14, 2021

no. 2? lololol. they got a carpola of poop jokes in this episode.

★ 8.0/10 (4651 votes)
#15

The Codpiece Topology

S2:E2

A jealous Leonard reacts to Penny's new guy by rebounding with Leslie.

mounirabbas Nov 19, 2015

nice ep! enjoyed it and penny with another guy ugh fff

★ 8.0/10 (4605 votes)
#16

The Lizard-Spock Expansion

S2:E8

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

★ 8.0/10 (4432 votes)
#17

The Financial Permeability

S2:E14

Sheldon's solution to Penny's financial difficulty leads to a confrontation between Leonard and Penny's ex-boyfriend.

palharesf Jun 10, 2021

Lots of continuity here, that's pretty nice

★ 8.0/10 (4806 votes)
#18

The Terminator Decoupling

S2:E17

Leonard, Sheldon and Wolowitz are ecstatic to learn that a famous science-fiction actress (Summer Glau) is on board the train they are taking to San Francisco.

Faelz Mar 29, 2022

This was kind of cringy...

★ 7.9/10 (4694 votes)
#19

The Griffin Equivalency

S2:E4

Raj gets an inflated ego and makes a play for Penny after being referenced in a magazine article.

Faelz Mar 23, 2022

This was hilarious. That smile haha

★ 7.9/10 (4474 votes)
#20

The Friendship Algorithm

S2:E13

Sheldon creates a scientific procedure for making friends.

ahmed365 Jan 10, 2019

He's stuck in an infinite loop, that was hilarious XD

★ 7.9/10 (4335 votes)
#21

The Hofstadter Isotope

S2:E20

A fellow comic book enthusiast's hitting on Penny leads to Leonard and Howard going to a bar's Ladies' Night.

demmy Dec 31, 2016

Lovely episode! Cant figure out penny's type really

★ 7.8/10 (4509 votes)
#22

The Killer Robot Instability

S2:E12

Penny's criticism of Wolowitz's romantic life pushes him into depression and AWOL for a fighting robot battle the rest of guys are depending on him for.

ahmed365 Jan 10, 2019

I can't stop laughing from the way Penny got freaked out by the killer robot destroying the door XDD

★ 7.6/10 (4468 votes)
#23

The Vartabedian Conundrum

S2:E10

Leonard asks Penny for advice when his new relationship starts moving too fast.

apokalupsis May 11, 2018

I just love Stephanie. She should have been made a regular.

★ 7.6/10 (4468 votes)
#1

The Vartabedian Conundrum

S2:E10

Leonard asks Penny for advice when his new relationship starts moving too fast.

apokalupsis May 11, 2018

I just love Stephanie. She should have been made a regular.

★ 7.8/10 (4509 votes)
#2

The Killer Robot Instability

S2:E12

Penny's criticism of Wolowitz's romantic life pushes him into depression and AWOL for a fighting robot battle the rest of guys are depending on him for.

ahmed365 Jan 10, 2019

I can't stop laughing from the way Penny got freaked out by the killer robot destroying the door XDD

★ 7.9/10 (4694 votes)
#3

The Griffin Equivalency

S2:E4

Raj gets an inflated ego and makes a play for Penny after being referenced in a magazine article.

Faelz Mar 23, 2022

This was hilarious. That smile haha

★ 7.9/10 (4474 votes)
#4

The Friendship Algorithm

S2:E13

Sheldon creates a scientific procedure for making friends.

ahmed365 Jan 10, 2019

He's stuck in an infinite loop, that was hilarious XD

★ 7.9/10 (4335 votes)
#5

The Hofstadter Isotope

S2:E20

A fellow comic book enthusiast's hitting on Penny leads to Leonard and Howard going to a bar's Ladies' Night.

demmy Dec 31, 2016

Lovely episode! Cant figure out penny's type really

★ 8.0/10 (4651 votes)
#6

The Codpiece Topology

S2:E2

A jealous Leonard reacts to Penny's new guy by rebounding with Leslie.

mounirabbas Nov 19, 2015

nice ep! enjoyed it and penny with another guy ugh fff

★ 8.0/10 (4605 votes)
#7

The Lizard-Spock Expansion

S2:E8

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

★ 8.0/10 (4432 votes)
#8

The Financial Permeability

S2:E14

Sheldon's solution to Penny's financial difficulty leads to a confrontation between Leonard and Penny's ex-boyfriend.

palharesf Jun 10, 2021

Lots of continuity here, that's pretty nice

★ 8.0/10 (4806 votes)
#9

The Terminator Decoupling

S2:E17

Leonard, Sheldon and Wolowitz are ecstatic to learn that a famous science-fiction actress (Summer Glau) is on board the train they are taking to San Francisco.

Faelz Mar 29, 2022

This was kind of cringy...

★ 8.1/10 (4554 votes)
#10

The White Asparagus Triangulation

S2:E9

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

palharesf May 29, 2021

Sheldon at the movie theater - probably the funniest scene on the show so far

★ 8.1/10 (4451 votes)
#11

The Cushion Saturation

S2:E16

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

palharesf Jun 11, 2021

Sheldon sitting down is so funny 😂

★ 8.1/10 (4473 votes)
#12

The Work Song Nanocluster

S2:E18

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

★ 8.1/10 (4513 votes)
#13

The Dead Hooker Juxtaposition

S2:E19

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

palharesf Jun 14, 2021

It's a trap! 😁😂 Sheldon

★ 8.1/10 (4291 votes)
#14

The Classified Materials Turbulence

S2:E22

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.

rasslingrob7 Jan 14, 2021

no. 2? lololol. they got a carpola of poop jokes in this episode.

★ 8.2/10 (5020 votes)
#15

The Bad Fish Paradigm

S2:E1

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

OM4R Jan 1, 2016

Is it that hard to keep a secret nowadays ?

★ 8.2/10 (4832 votes)
#16

The Cooper-Nowitzki Theorem

S2:E6

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

ejordz_2005 Oct 28, 2022

Poor Sheldon lol. He is a scientist but still wants to chill with his friends.

★ 8.2/10 (4418 votes)
#17

The Monopolar Expedition

S2:E23

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

★ 8.3/10 (4813 votes)
#18

The Euclid Alternative

S2:E5

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

palharesf May 26, 2021

lol Sheldon's social ineptitude reached new levels here. It's fun to see him getting the worse of it...

★ 8.4/10 (4678 votes)
#19

The Vegas Renormalization

S2:E21

Leonard and Koothrappali escort a heartbroken Wolowitz to Las Vegas, and Sheldon becomes locked out of his apartment and must stay with Penny.

saltervallos-deleted-1609330405 Aug 13, 2019

“Raj, there’s no place for truth on the internet.”

★ 8.6/10 (5107 votes)
#20

The Panty Piñata Polarization

S2:E7

When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate.

palharesf May 28, 2021

The stuff with Howard and Raj - positively creepy

★ 8.7/10 (5414 votes)
#21

The Barbarian Sublimation

S2:E3

Sheldon creates a monster when he introduces Penny to online gaming.

★ 8.8/10 (5334 votes)
#22

The Maternal Capacitance

S2:E15

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

palharesf Jun 11, 2021

That was one of the funniest episodes of the show so far - Leonard's mom talking to Penny, Raj and H...

★ 9.1/10 (7467 votes)
#23

The Bath Item Gift Hypothesis

S2:E11

Penny starts dating Leonard's handsome colleague; Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.

leomovies Mar 31, 2016

its a saturnalia miracle. jajaja

★ 8.2/10 (5020 votes)

The Bad Fish Paradigm

S2:E1

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

OM4R Jan 1, 2016

Is it that hard to keep a secret nowadays ?

★ 8.0/10 (4651 votes)

The Codpiece Topology

S2:E2

A jealous Leonard reacts to Penny's new guy by rebounding with Leslie.

mounirabbas Nov 19, 2015

nice ep! enjoyed it and penny with another guy ugh fff

★ 8.7/10 (5414 votes)

The Barbarian Sublimation

S2:E3

Sheldon creates a monster when he introduces Penny to online gaming.

★ 7.9/10 (4694 votes)

The Griffin Equivalency

S2:E4

Raj gets an inflated ego and makes a play for Penny after being referenced in a magazine article.

Faelz Mar 23, 2022

This was hilarious. That smile haha

★ 8.3/10 (4813 votes)

The Euclid Alternative

S2:E5

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

palharesf May 26, 2021

lol Sheldon's social ineptitude reached new levels here. It's fun to see him getting the worse of it...

★ 8.2/10 (4832 votes)

The Cooper-Nowitzki Theorem

S2:E6

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

ejordz_2005 Oct 28, 2022

Poor Sheldon lol. He is a scientist but still wants to chill with his friends.

★ 8.6/10 (5107 votes)

The Panty Piñata Polarization

S2:E7

When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate.

palharesf May 28, 2021

The stuff with Howard and Raj - positively creepy

★ 8.0/10 (4605 votes)

The Lizard-Spock Expansion

S2:E8

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

★ 8.1/10 (4554 votes)

The White Asparagus Triangulation

S2:E9

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

palharesf May 29, 2021

Sheldon at the movie theater - probably the funniest scene on the show so far

★ 7.6/10 (4468 votes)

The Vartabedian Conundrum

S2:E10

Leonard asks Penny for advice when his new relationship starts moving too fast.

apokalupsis May 11, 2018

I just love Stephanie. She should have been made a regular.

★ 9.1/10 (7467 votes)

The Bath Item Gift Hypothesis

S2:E11

Penny starts dating Leonard's handsome colleague; Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.

leomovies Mar 31, 2016

its a saturnalia miracle. jajaja

★ 7.8/10 (4509 votes)

The Killer Robot Instability

S2:E12

Penny's criticism of Wolowitz's romantic life pushes him into depression and AWOL for a fighting robot battle the rest of guys are depending on him for.

ahmed365 Jan 10, 2019

I can't stop laughing from the way Penny got freaked out by the killer robot destroying the door XDD

★ 7.9/10 (4474 votes)

The Friendship Algorithm

S2:E13

Sheldon creates a scientific procedure for making friends.

ahmed365 Jan 10, 2019

He's stuck in an infinite loop, that was hilarious XD

★ 8.0/10 (4432 votes)

The Financial Permeability

S2:E14

Sheldon's solution to Penny's financial difficulty leads to a confrontation between Leonard and Penny's ex-boyfriend.

palharesf Jun 10, 2021

Lots of continuity here, that's pretty nice

★ 8.8/10 (5334 votes)

The Maternal Capacitance

S2:E15

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

palharesf Jun 11, 2021

That was one of the funniest episodes of the show so far - Leonard's mom talking to Penny, Raj and H...

★ 8.1/10 (4451 votes)

The Cushion Saturation

S2:E16

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

palharesf Jun 11, 2021

Sheldon sitting down is so funny 😂

★ 8.0/10 (4806 votes)

The Terminator Decoupling

S2:E17

Leonard, Sheldon and Wolowitz are ecstatic to learn that a famous science-fiction actress (Summer Glau) is on board the train they are taking to San Francisco.

Faelz Mar 29, 2022

This was kind of cringy...

★ 8.1/10 (4473 votes)

The Work Song Nanocluster

S2:E18

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

★ 8.1/10 (4513 votes)

The Dead Hooker Juxtaposition

S2:E19

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

palharesf Jun 14, 2021

It's a trap! 😁😂 Sheldon

★ 7.9/10 (4335 votes)

The Hofstadter Isotope

S2:E20

A fellow comic book enthusiast's hitting on Penny leads to Leonard and Howard going to a bar's Ladies' Night.

demmy Dec 31, 2016

Lovely episode! Cant figure out penny's type really

★ 8.4/10 (4678 votes)

The Vegas Renormalization

S2:E21

Leonard and Koothrappali escort a heartbroken Wolowitz to Las Vegas, and Sheldon becomes locked out of his apartment and must stay with Penny.

saltervallos-deleted-1609330405 Aug 13, 2019

“Raj, there’s no place for truth on the internet.”

★ 8.1/10 (4291 votes)

The Classified Materials Turbulence

S2:E22

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.

rasslingrob7 Jan 14, 2021

no. 2? lololol. they got a carpola of poop jokes in this episode.

★ 8.2/10 (4418 votes)

The Monopolar Expedition

S2:E23

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

Season Average Rating Episodes Best Episode Worst Episode
3 ★ 8.2 23
★ 9.0 The Staircase Implementation
★ 7.4 The Cornhusker Vortex
2 ★ 8.2 23
★ 9.1 The Bath Item Gift Hypothesis
★ 7.6 The Vartabedian Conundrum
1 ★ 8.1 17
★ 8.5 The Tangerine Factor
★ 7.6 The Fuzzy Boots Corollary
4 ★ 8.0 24
★ 8.7 The Robotic Manipulation
★ 7.5 The Bus Pants Utilization
6 ★ 7.9 24
★ 8.4 The 43 Peculiarity
★ 7.6 The Date Night Variable
5 ★ 7.9 24
★ 8.5 The Good Guy Fluctuation
★ 7.3 The Speckerman Recurrence
7 ★ 7.9 24
★ 8.8 The Thanksgiving Decoupling
★ 7.4 The Hesitation Ramification
9 ★ 7.6 24
★ 9.0 The Opening Night Excitation
★ 6.8 The Matrimonial Momentum
8 ★ 7.5 24
★ 8.0 The Prom Equivalency
★ 7.0 The First Pitch Insufficiency
10 ★ 7.4 24
★ 8.5 The Long Distance Dissonance
★ 6.8 The Cognition Regeneration
12 ★ 7.3 23
★ 8.2 The Imitation Perturbation
★ 6.8 The Planetarium Collision
11 ★ 7.3 24
★ 9.0 The Bow Tie Asymmetry
★ 6.8 The Athenaeum Allocation
Johnny Galecki
Jim Parsons
Kaley Cuoco
Simon Helberg
+2
Cast & Crew

View all 6 cast members and crew