Penny's first date with Leonard goes awry; Penny finds Sheldon to be an unwilling confidant.
29 September, 2008 720p
S2 E2 - The Codpiece Topology
A jealous Leonard reacts to Penny's new guy by rebounding with Leslie.
06 October, 2008 720p
S2 E3 - The Barbarian Sublimation
Sheldon creates a monster when he introduces Penny to online gaming.
13 October, 2008 720p
S2 E4 - The Griffin Equivalency
Raj gets an inflated ego and makes a play for Penny after being referenced in a magazine article.
20 October, 2008 720p
S2 E5 - The Euclid Alternative
Leonard and his friends stage an intervention to force Sheldon to face his fear of driving.
03 November, 2008 720p
S2 E6 - The Cooper-Nowitzki Theorem
Sheldon and the gang are confused when a young grad student is attracted to him.
10 November, 2008 720p
S2 E7 - The Panty Piñata Polarization
When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate.
17 November, 2008 720p
S2 E8 - The Lizard-Spock Expansion
Leonard inadvertently steals away the new woman Wolowitz thinks is the love of his life.
24 November, 2008 720p
S2 E9 - The White Asparagus Triangulation
Sheldon is thrilled when Leonard starts dating a woman who meets Sheldon's stringent standards.
08 December, 2008 720p
S2 E10 - The Vartabedian Conundrum
Leonard asks Penny for advice when his new relationship starts moving too fast.
15 December, 2008 720p
S2 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.
12 January, 2009 720p
S2 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.
19 January, 2009 720p
S2 E13 - The Friendship Algorithm
Sheldon creates a scientific procedure for making friends.
02 February, 2009 720p
S2 E14 - The Financial Permeability
Sheldon's solution to Penny's financial difficulty leads to a confrontation between Leonard and Penny's ex-boyfriend.
09 February, 2009 720p
S2 E15 - The Maternal Capacitance
Leonard and Penny are drawn together after a disastrous visit from Leonard's mother.
02 March, 2009 720p
S2 E16 - The Cushion Saturation
A paintball game leads to a fight between Sheldon and Penny, and romance for Leslie and Wolowitz.
09 March, 2009 720p
S2 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.
16 March, 2009 720p
S2 E18 - The Work Song Nanocluster
Penny's home business turns into a complete nightmare when Sheldon takes over.
30 March, 2009 720p
S2 E19 - The Dead Hooker Juxtaposition
Penny squares off with a new beautiful female neighbor who may become the building's "new Penny."
13 April, 2009 720p
S2 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.
27 April, 2009 720p
S2 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.
04 May, 2009 720p
S2 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.
11 May, 2009 720p
S2 E23 - The Monopolar Expedition
The guys' plan to work over the summer at the North Pole makes Penny revaluate her feelings for Leonard.
