The Big Bang Theory Season 2 Episodes

Find out where to watch Season 2 of The Big Bang Theory tonight
Overview TV Listings Seasons & Episodes Cast

Season 2 Episode Guide

Episode 1 - The Bad Fish Paradigm

A secret threatens to derail Leonard and Penny's romance.
Episode 2 - The Codpiece Topology

Penny and Leonard compete as to who'll be the first to move on.
Episode 3 - The Barbarian Sublimation

Penny's addiction to online games wreaks havoc on Sheldon.
Episode 4 - The Griffin Equivalency

Raj's inflated ego puts all of his friendships in jeopardy.
Episode 5 - The Euclid Alternative

Sheldon confronts his greatest fear -- driving.
Episode 6 - The Cooper-Nowitzki Theorem

Sheldon's friends ponder the mystery of his love life.
Episode 7 - The Panty Piñata Polarisation

Sheldon and Penny engage in a battle of wills.
Episode 8 - The Lizard-Spock Expansion

Leonard accidentally steals Wolowitz's crush.
Episode 9 - The White Asparagus Triangulation

Sheldon likes Leonard's new girlfriend too much.
Episode 10 - The Vartabedian Conundrum

Leonard can't tell his girlfriend "no."
Episode 11 - The Bath Item Gift Hypothesis

Leonard's handsome colleague starts dating Penny.
Episode 12 - The Killer Robot Instability

Wolowitz abandons his friends in their hour of need.
Episode 13 - The Friendship Algorithm

Sheldon develops a scientific procedure for making friends.
Episode 14 - The Financial Permeability

Sheldon helps Penny out of a financial jam.
Episode 15 - The Maternal Capacitance

Leonard's mother comes to visit.
Episode 16 - The Cushion Saturation

A paintball game has surprising consequences for everyone.
Episode 17 - The Terminator Decoupling

The guys meet "Terminator" actress Summer Glau on a train.
Episode 18 - The Work Song Nanocluster

Penny's friends take over her home business.
Episode 19 - The Dead Hooker Juxtaposition

Penny develops a rivalry with a sexy female neighbour.
Episode 20 - The Hofstadter Isotope

A trip to the comic book store leads to an unusual romance.
Episode 21 - The Vegas Renormalisation

The boys go to Vegas, leaving Sheldon locked out at home.
Episode 22 - The Classified Materials Turbulence

Penny makes a surprising revelation on her date with Stuart.
Episode 23 - The Monopolar Expedition

Leonard and Penny reconsider their feelings for one another.


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