The Big Bang Theory: Season 2
The Big Bang Theory Season 2 continues the overarching saga across 23 episodes, following the lives of physicists Leonard and Sheldon alongside their nerd-centric social circle with pals Howard and Raj. The American sitcom humorously explores the personal lives of young physicists and the nerd culture of contemporary American youth, contrasting them with the normal world. The series focuses on this group of physicist
Season 2 Lore Primer
Key plot threads, lore context, and character stakes you need to remember before diving into this season.
- The series centers on a group of young physicist friends.
- The main characters include physicists Leonard and Sheldon.
- Leonard and Sheldon share a nerd-centric social circle with pals Howard and Raj.
- The show pokes fun at the personal lives of these physicists and nerd subculture.
Season overview
The Big Bang Theory Season 2 continues the overarching saga across 23 episodes, following the lives of physicists Leonard and Sheldon alongside their nerd-centric social circle with pals Howard and Raj. The American sitcom humorously explores the personal lives of young physicists and the nerd culture of contemporary American youth, contrasting them with the normal world. The series focuses on this group of physicist friends living slightly outside of normal society.
Episode Guide
Season 2 Progress Shield
The Bad Fish Paradigm
Sep 22, 2008 · 22 min
Penny's first date with Leonard goes awry; Penny finds Sheldon to be an unwilling confidant.
The Codpiece Topology
Sep 29, 2008 · 21 min
A jealous Leonard reacts to Penny's new guy by rebounding with Leslie.
The Barbarian Sublimation
Oct 6, 2008 · 21 min
Sheldon creates a monster when he introduces Penny to online gaming.
The Griffin Equivalency
Oct 13, 2008 · 21 min
Raj gets an inflated ego and makes a play for Penny after being referenced in a magazine article.
The Euclid Alternative
Oct 20, 2008 · 20 min
Leonard and his friends stage an intervention to force Sheldon to face his fear of driving.
The Cooper-Nowitzki Theorem
Nov 3, 2008 · 21 min
Sheldon and the gang are confused when a young grad student is attracted to him.
The Panty Piñata Polarization
Nov 10, 2008 · 21 min
When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate.
The Lizard-Spock Expansion
Nov 17, 2008 · 20 min
Leonard inadvertently steals away the new woman Wolowitz thinks is the love of his life.
The White Asparagus Triangulation
Nov 24, 2008 · 21 min
Sheldon is thrilled when Leonard starts dating a woman who meets Sheldon's stringent standards.
The Vartabedian Conundrum
Dec 8, 2008 · 21 min
Leonard asks Penny for advice when his new relationship starts moving too fast.
The Bath Item Gift Hypothesis
Dec 15, 2008 · 21 min
Penny starts dating Leonard's handsome colleague; Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.
The Killer Robot Instability
Jan 12, 2009 · 21 min
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.
The Friendship Algorithm
Jan 19, 2009 · 21 min
Sheldon creates a scientific procedure for making friends.
The Financial Permeability
Feb 2, 2009 · 21 min
Sheldon's solution to Penny's financial difficulty leads to a confrontation between Leonard and Penny's ex-boyfriend.
The Maternal Capacitance
Feb 9, 2009 · 21 min
Leonard and Penny are drawn together after a disastrous visit from Leonard's mother.
The Cushion Saturation
Mar 2, 2009 · 21 min
A paintball game leads to a fight between Sheldon and Penny, and romance for Leslie and Wolowitz.
The Terminator Decoupling
Mar 9, 2009 · 21 min
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.
The Work Song Nanocluster
Mar 16, 2009 · 20 min
Penny's home business turns into a complete nightmare when Sheldon takes over.
The Dead Hooker Juxtaposition
Mar 30, 2009 · 20 min
Penny squares off with a new beautiful female neighbor who may become the building's "new Penny."
The Hofstadter Isotope
Apr 13, 2009 · 20 min
A fellow comic book enthusiast's hitting on Penny leads to Leonard and Howard going to a bar's Ladies' Night.
The Vegas Renormalization
Apr 27, 2009 · 22 min
Leonard and Koothrappali escort a heartbroken Wolowitz to Las Vegas, and Sheldon becomes locked out of his apartment and must stay with Penny.
The Classified Materials Turbulence
May 4, 2009 · 19 min
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
The Monopolar Expedition
May 11, 2009 · 21 min
The guys' plan to work over the summer at the North Pole makes Penny revaluate her feelings for Leonard.