The Big Bang Theory - Season 2

The Big Bang Theory - Season 2

Season 2

Leonard and Penny's relationship takes a turn for the worse when they break up, but is quickly resolved. Soon their relationship progresses into a stronger friendship than before, while Sheldon and Penny's friendship slowly begins.

Network
Episodes23
DatesSep 22, 2008 - May 11, 2009
Previous SeasonNext Season

Episodes

The Bad Fish Paradigm
Season 2Episode 130 min

The Bad Fish Paradigm

After her first date with Leonard goes awry, Penny finds an unwilling confidant in Leonard's anti-social roommate, Sheldon.

Sep 22, 2008
The Codpiece Topology
Season 2Episode 230 min

The Codpiece Topology

When Leonard sees Penny with a handsome new guy, he enters into a rebound relationship with Sheldon's nemesis, Leslie Winkle.

Sep 29, 2008
The Barbarian Sublimation
Season 2Episode 330 min

The Barbarian Sublimation

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

Oct 6, 2008
The Griffin Equivalency
Season 2Episode 430 min

The Griffin Equivalency

Raj, newly famous because of an article in a magazine, gets a big head and makes a disastrous play for Leonard's crush, Penny.

Oct 13, 2008
The Euclid Alternative
Season 2Episode 530 min

The Euclid Alternative

Leonard and his friends stage an intervention to make Sheldon confront his longstanding fear of driving.

Oct 20, 2008
The Cooper-Nowitzki Theorem
Season 2Episode 630 min

The Cooper-Nowitzki Theorem

Young grad student's attraction to Sheldon confuses everyone, including Sheldon himself.

Nov 3, 2008
The Panty Piñata Polarization
Season 2Episode 730 min

The Panty Piñata Polarization

Penny vows to get revenge on Sheldon when he bans her from the apartment for a series of petty infractions.

Nov 10, 2008
The Lizard-Spock Expansion
Season 2Episode 830 min

The Lizard-Spock Expansion

Wolowitz thinks he's found the love of his life, until she meets Leonard.

Nov 17, 2008
The White Asparagus Triangulation
Season 2Episode 930 min

The White Asparagus Triangulation

Sheldon can barely contain his joy when Leonard starts dating a woman who meets Sheldon's exacting standards.

Nov 24, 2008
The Vartabedian Conundrum
Season 2Episode 1030 min

The Vartabedian Conundrum

When Leonard's relationship with a new woman starts moving too fast, he goes to Penny for advice.

Dec 8, 2008
The Bath Item Gift Hypothesis
Season 2Episode 1130 min

The Bath Item Gift Hypothesis

Christmas is a source of stress for Leonard - whose handsome colleague starts dating Penny - and his friends, who are being tormented by Sheldon's obsession with gift-giving etiquette.

Dec 15, 2008
The Killer Robot Instability
Season 2Episode 1230 min

The Killer Robot Instability

When Penny's comment about Wolowitz's love life sends him into a depressed stupor, his friends lose their most important team-mate in an upcoming fighting robot competition.

Jan 12, 2009
The Friendship Algorithm
Season 2Episode 1330 min

The Friendship Algorithm

Socially awkward Sheldon develops a scientific procedure for making friends.

Jan 19, 2009
The Financial Permeability
Season 2Episode 1430 min

The Financial Permeability

Sheldon's "simple" solution to Penny's financial problem leads to a confrontation between Leonard and Penny's hulking ex-boyfriend, Kurt.

Feb 2, 2009
The Maternal Capacitance
Season 2Episode 1530 min

The Maternal Capacitance

Disastrous visit from Mrs. Hofstadter brings Leonard and Penny closer together.

Feb 9, 2009
The Cushion Saturation
Season 2Episode 1630 min

The Cushion Saturation

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

Mar 2, 2009
The Terminator Decoupling
Season 2Episode 1730 min

The Terminator Decoupling

Train trip to San Francisco takes a major detour when Leonard, Sheldon, Wolowitz and Raj discover that beautiful sci-fi actress Summer Glau is onboard.

Mar 9, 2009
The Work Song Nanocluster
Season 2Episode 1830 min

The Work Song Nanocluster

Penny's home hair products business becomes a complete nightmare when a caffeine-addled Sheldon takes over.

Mar 16, 2009
The Dead Hooker Juxtaposition
Season 2Episode 1930 min

The Dead Hooker Juxtaposition

Penny develops a rivalry with a sexy female neighbor who threatens to become "The New Penny" in the building.

Mar 30, 2009
The Hofstadter Isotope
Season 2Episode 2030 min

The Hofstadter Isotope

While a fellow comic book-loving pal of the guys romances Penny, Leonard and Wolowitz venture out into the world of "Ladies' Night" at a local bar.

Apr 13, 2009
The Vegas Renormalization
Season 2Episode 2130 min

The Vegas Renormalization

Leonard and Koothrappali take a heartbroken Wolowitz to Las Vegas, leaving Sheldon locked out of his apartment and forced to bunk with Penny.

Apr 27, 2009
The Classified Materials Turbulence
Season 2Episode 2230 min

The Classified Materials Turbulence

Things begin to look up for Leonard when Penny makes a surprising revelation on her second date with Stuart. Meanwhile, Wolowitz enlists his friends' help when he discovers a critical design flaw in his project for NASA.

May 4, 2009
The Monopolar Expedition
Season 2Episode 2330 min

The Monopolar Expedition

Penny is conflicted when Leonard and his friends decide to spend the summer working - at the North Pole.

May 11, 2009

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