Season 2 (2008)

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: 23

Star Cast: Johnny Galecki , Jim Parsons , Kaley Cuoco , Simon Helberg ,

Episodes List

Ep.1 The Bad Fish Paradigm

Air Date: 2008-09-22

Penny's first date with Leonard goes awry; Penny finds Sheldon to be an unwilling confidant.

Ep.2 The Codpiece Topology

Air Date: 2008-09-29

A jealous Leonard reacts to Penny's new guy by rebounding with Leslie.

Ep.3 The Barbarian Sublimation

Air Date: 2008-10-06

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

Ep.4 The Griffin Equivalency

Air Date: 2008-10-13

Raj gets an inflated ego and makes a play for Penny after being referenced in a magazine article.

Ep.5 The Euclid Alternative

Air Date: 2008-10-20

Leonard and his friends stage an intervention to force Sheldon to face his fear of driving.

Ep.6 The Cooper-Nowitzki Theorem

Air Date: 2008-11-03

Sheldon and the gang are confused when a young grad student is attracted to him.

Ep.7 The Panty Piñata Polarization

Air Date: 2008-11-10

When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate.

Ep.8 The Lizard-Spock Expansion

Air Date: 2008-11-17

Leonard inadvertently steals away the new woman Wolowitz thinks is the love of his life.

Ep.9 The White Asparagus Triangulation

Air Date: 2008-11-24

Sheldon is thrilled when Leonard starts dating a woman who meets Sheldon's stringent standards.

Ep.10 The Vartabedian Conundrum

Air Date: 2008-12-08

Leonard asks Penny for advice when his new relationship starts moving too fast.

Ep.11 The Bath Item Gift Hypothesis

Air Date: 2008-12-15

Penny starts dating Leonard's handsome colleague; Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.

Ep.12 The Killer Robot Instability

Air Date: 2009-01-12

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.

Ep.13 The Friendship Algorithm

Air Date: 2009-01-19

Sheldon creates a scientific procedure for making friends.

Ep.14 The Financial Permeability

Air Date: 2009-02-02

Sheldon's solution to Penny's financial difficulty leads to a confrontation between Leonard and Penny's ex-boyfriend.

Ep.15 The Maternal Capacitance

Air Date: 2009-02-09

Leonard and Penny are drawn together after a disastrous visit from Leonard's mother.

Ep.16 The Cushion Saturation

Air Date: 2009-03-02

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

Ep.17 The Terminator Decoupling

Air Date: 2009-03-09

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.

Ep.18 The Work Song Nanocluster

Air Date: 2009-03-16

Penny's home business turns into a complete nightmare when Sheldon takes over.

Ep.19 The Dead Hooker Juxtaposition

Air Date: 2009-03-30

Penny squares off with a new beautiful female neighbor who may become the building's "new Penny."

Ep.20 The Hofstadter Isotope

Air Date: 2009-04-13

A fellow comic book enthusiast's hitting on Penny leads to Leonard and Howard going to a bar's Ladies' Night.

Ep.21 The Vegas Renormalization

Air Date: 2009-04-27

Leonard and Koothrappali escort a heartbroken Wolowitz to Las Vegas, and Sheldon becomes locked out of his apartment and must stay with Penny.

Ep.22 The Classified Materials Turbulence

Air Date: 2009-05-04

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.