Johnny Galecki
Leonard Hofstadter
Series SeasonSeason 2 episodes2008
The Big Bang Theory
Season 2
This season, Leonard gets a girl. So does Sheldon. Howard drives the Mars Rover into a ditch. Raj woos a terminator. Gorgeous girl-next-door Penny falls under the spell of Age of Conan. And super-smart, ueberconfident Leslie Winkler reduces mere men to spineless jellyfish.
Episodes
Each episode has its own detail page.
Episode 122 min2008-09-22
The Bad Fish Paradigm
Penny's first date with Leonard goes awry; Penny finds Sheldon to be an unwilling confidant.
Episode 221 min2008-09-29
The Codpiece Topology
A jealous Leonard reacts to Penny's new guy by rebounding with Leslie.
Episode 321 min2008-10-06
The Barbarian Sublimation
Sheldon creates a monster when he introduces Penny to online gaming.
Episode 421 min2008-10-13
The Griffin Equivalency
Raj gets an inflated ego and makes a play for Penny after being referenced in a magazine article.
Episode 520 min2008-10-20
The Euclid Alternative
Leonard and his friends stage an intervention to force Sheldon to face his fear of driving.
Episode 621 min2008-11-03
The Cooper-Nowitzki Theorem
Sheldon and the gang are confused when a young grad student is attracted to him.
Episode 721 min2008-11-10
The Panty Piñata Polarization
When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate.
Episode 820 min2008-11-17
The Lizard-Spock Expansion
Leonard inadvertently steals away the new woman Wolowitz thinks is the love of his life.
Episode 921 min2008-11-24
The White Asparagus Triangulation
Sheldon is thrilled when Leonard starts dating a woman who meets Sheldon's stringent standards.
Episode 1021 min2008-12-08
The Vartabedian Conundrum
Leonard asks Penny for advice when his new relationship starts moving too fast.
Episode 1121 min2008-12-15
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.
Episode 1221 min2009-01-12
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.
Episode 1321 min2009-01-19
The Friendship Algorithm
Sheldon creates a scientific procedure for making friends.
Episode 1421 min2009-02-02
The Financial Permeability
Sheldon's solution to Penny's financial difficulty leads to a confrontation between Leonard and Penny's ex-boyfriend.
Episode 1521 min2009-02-09
The Maternal Capacitance
Leonard and Penny are drawn together after a disastrous visit from Leonard's mother.
Episode 1621 min2009-03-02
The Cushion Saturation
A paintball game leads to a fight between Sheldon and Penny, and romance for Leslie and Wolowitz.
Episode 1721 min2009-03-09
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.
Episode 1820 min2009-03-16
The Work Song Nanocluster
Penny's home business turns into a complete nightmare when Sheldon takes over.
Episode 1920 min2009-03-30
The Dead Hooker Juxtaposition
Penny squares off with a new beautiful female neighbor who may become the building's "new Penny."
Episode 2020 min2009-04-13
The Hofstadter Isotope
A fellow comic book enthusiast's hitting on Penny leads to Leonard and Howard going to a bar's Ladies' Night.
Episode 2122 min2009-04-27
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.
Episode 2219 min2009-05-04
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.
Episode 2321 min2009-05-11
The Monopolar Expedition
The guys' plan to work over the summer at the North Pole makes Penny revaluate her feelings for Leonard.