The Big Bang Theory
Physicists Leonard and Sheldon build their nerdy friend group with Howard and Raj, and their world expands when aspiring actress Penny moves in next door. Expect plenty of science talk, social awkwardness, and fast friendships as their routines get tangled with neighbors and visitors.
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Season 2
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1
E1
The Bad Fish Paradigm
Penny's first date with Leonard goes awry; Penny finds Sheldon to be an unwilling confidant.
Sep 22, 2008 · 22m -
2
E2
The Codpiece Topology
A jealous Leonard reacts to Penny's new guy by rebounding with Leslie.
Sep 29, 2008 · 21m -
3
E3
The Barbarian Sublimation
Sheldon creates a monster when he introduces Penny to online gaming.
Oct 6, 2008 · 21m -
4
E4
The Griffin Equivalency
Raj gets an inflated ego and makes a play for Penny after being referenced in a magazine article.
Oct 13, 2008 · 21m -
5
E5
The Euclid Alternative
Leonard and his friends stage an intervention to force Sheldon to face his fear of driving.
Oct 20, 2008 · 20m -
6
E6
The Cooper-Nowitzki Theorem
Sheldon and the gang are confused when a young grad student is attracted to him.
Nov 3, 2008 · 21m -
7
E7
The Panty Piñata Polarization
When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate.
Nov 10, 2008 · 21m -
8
E8
The Lizard-Spock Expansion
Leonard inadvertently steals away the new woman Wolowitz thinks is the love of his life.
Nov 17, 2008 · 20m -
9
E9
The White Asparagus Triangulation
Sheldon is thrilled when Leonard starts dating a woman who meets Sheldon's stringent standards.
Nov 24, 2008 · 21m -
10
E10
The Vartabedian Conundrum
Leonard asks Penny for advice when his new relationship starts moving too fast.
Dec 8, 2008 · 21m -
11
E11
The Bath Item Gift Hypothesis
Penny starts dating Leonard's handsome colleague; Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.
Dec 15, 2008 · 21m -
12
E12
The Killer Robot Instability
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.
Jan 12, 2009 · 21m -
13
E13
The Friendship Algorithm
Sheldon creates a scientific procedure for making friends.
Jan 19, 2009 · 21m -
14
E14
The Financial Permeability
Sheldon's solution to Penny's financial difficulty leads to a confrontation between Leonard and Penny's ex-boyfriend.
Feb 2, 2009 · 21m -
15
E15
The Maternal Capacitance
Leonard and Penny are drawn together after a disastrous visit from Leonard's mother.
Feb 9, 2009 · 21m -
16
E16
The Cushion Saturation
A paintball game leads to a fight between Sheldon and Penny, and romance for Leslie and Wolowitz.
Mar 2, 2009 · 21m -
17
E17
The Terminator Decoupling
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.
Mar 9, 2009 · 21m -
18
E18
The Work Song Nanocluster
Penny's home business turns into a complete nightmare when Sheldon takes over.
Mar 16, 2009 · 20m -
19
E19
The Dead Hooker Juxtaposition
Penny squares off with a new beautiful female neighbor who may become the building's "new Penny."
Mar 30, 2009 · 21m -
20
E20
The Hofstadter Isotope
A fellow comic book enthusiast's hitting on Penny leads to Leonard and Howard going to a bar's Ladies' Night.
Apr 13, 2009 · 20m -
21
E21
The Vegas Renormalization
Leonard and Koothrappali escort a heartbroken Wolowitz to Las Vegas, and Sheldon becomes locked out of his apartment and must stay with Penny.
Apr 27, 2009 · 21m -
22
E22
The Classified Materials Turbulence
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.
May 4, 2009 · 19m -
23
E23
The Monopolar Expedition
The guys' plan to work over the summer at the North Pole makes Penny revaluate her feelings for Leonard.
May 11, 2009 · 21m
