Big Bang Theory - Season 2

You thought the opposite of stupid loser was community college graduate?
S02E01 The Bad Fish Paradigm - 2008-09-22
Leonard becomes concerned when his date with Penny ends abruptly and she starts blowing him off. When told the truth, Sheldon would rather move out than keep Penny's reasons a secret from Leonard.
That
S02E02 The Codpiece Topology - 2008-09-29
Sheldon is annoyed when Leonard turns to Leslie for comfort after seeing Penny with another guy.
Here come the mummies, which spell do I use? The hateful strike, or the frenzy stance?
S02E03 The Barbarian Sublimation - 2008-10-06
Sheldon introduces Penny to online gaming, however she refuses to quit after becoming addicted.
I
S02E04 The Griffin Equivalency - 2008-10-13
The guys struggle to cope with Raj's arrogance after he is featured in a People magazine article.
Sheldon: Your check engine light is on. Penny: Mm-hmm. Sheldon: Typically that
S02E05 The Euclid Alternative - 2008-10-20
Sheldon annoys the gang when Leonard can't drive him to and from work, so they try to teach him how to drive.
Ramona: I know a terrific little Italian place. Sheldon: I never eat in strange restaurants. One runs the risk of non-standard cutlery.
S02E06 The Cooper Nowitzki Theorem - 2008-11-03
Sheldon is flattered when a graduate student takes a shine to him, however her extreme devotion becomes too much to handle.
Go ahead, eat it. I dare you.
S02E07 The Panty Pinata Polarization - 2008-11-10
Penny plans revenge when Sheldon bans her from his and Leonard's apartment, while Howard and Raj use the latest technology to try to find the house being used in "America's Next Top Model."
Hey Howard, you know it
S02E08 The Lizard Spock Expansion - 2008-11-17
Leonard and Howard's friendship is jeopardised when Leonard steals a girl from Howard.
It
S02E09 The White Asparagus Triangulation - 2008-11-24
Sheldon believes that Leonard will wreck his relationship with Stephanie, so he decides to take matters into his own hands.
Tell her you need the relationship to move at a pace you are both comfortable with.
S02E10 The Vartabedian Conundrum - 2008-12-08
Leonard tries to slow down his relationship with Stephanie when he realizes that they are living together, while Sheldon becomes convinced that he has an untraceable disease.
All I need is a healthy ovum and I can clone my own Leonard Nemoy.
S02E11 The Bath Item Gift Hypothesis - 2008-12-15
Leonard is disappointed when Penny develops an interest in an attractive physicist at the university. Meanwhile, Sheldon struggles to find an appropriate Christmas gift for Penny.
Howard: (singing) Marcy Grossman is sunshine on a cloudy day... when it
S02E12 The Killer Robot Instability - 2009-01-12
Howard becomes depressed after Penny makes a cruel statement about his love life, while the rest of the guys prepare for a grudge killer robot duel against an obnoxious colleague at the university.
What part of an inverse tangent function approaching an asymptote don
S02E13 The Friendship Algorithm - 2009-01-19
Sheldon tries to make friends with Kripke in the hope that it will get him access to a coveted computer at the university.
Penny: I don
S02E14 The Financial Permeability - 2009-02-02
Leonard and Sheldon try to help out Penny when she can't afford to pay her rent.
Sheldon: Normally, I
S02E15 The Maternal Capacitance - 2009-02-09
Sheldon hits it off with Leonard's psychoanalyst mother, but she drives Leonard and Penny to the bottle.
Sheldon: That is my spot, in an ever-changing world, it is a single point of consistency. If my life were expressed as a function on a four dimensional Cartesian coordinate system, that spot, at the moment I first sat on it, would be 0-0-0-0. Penny: (blank stare) What?
S02E16 The Cushion Saturation - 2009-03-02
Howard hooks up with Leslie, while Penny accidentally ruins Sheldon's spot on the couch.
If you married the famous rock guitarist Johnny Winter, you
S02E17 The Terminator Decoupling - 2009-03-09
On a train to San Francisco, Howard, Raj and Leonard fight for the affections of sci-fi star Summer Glau, while Sheldon is forced to turn to Penny for help when he leaves his flash drive behind.
I believe I
S02E18 The Work Song Nanocluster - 2009-03-16
Sheldon's assistance with Penny's home-based business leads to chaos.
I
S02E19 The Dead Hooker Juxtaposition - 2009-03-30
Penny becomes jealous when a gorgeous new neighbor attracts the guys' attention.
Blink twice if you
S02E20 The Hofstadter Isotope - 2009-04-13
Leonard is upset when the owner of the comic book store goes on a date with Penny, so he convinces Howard and Raj to take him to a bar so that he can pick up a woman of his own.
Leonard: We were wondering... Raj: lf you
S02E21 The Vegas Renormalization - 2009-04-27
After being dumped by Leslie, Howard heads to Las Vegas with Leonard and Raj. Meanwhile, Penny is forced to take in Sheldon after he locks himself out of his apartment.
Look, Leonard, what goes on between me and Stuart is none of your business. So just leave it alone, okay?
S02E22 The Classified Materials Turbulence - 2009-05-04
Penny's second date with Stuart has significant implications for Leonard. Howard enlists the guys' help with one of his NASA projects.
Sheldon: To begin with, you will remove funny bone for two hundred dollars.  Howard: For this I went to MIT.
S02E23 The Monopolar Expedition - 2009-05-11
Penny gets upset when she finds out Leonard and the guys plan to work at the North Pole for the summer.