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Raj Talks to Alicia
Watch The Big Bang Theory Season 2 Episode 19
"The Dead Hooker Juxtaposition"
Original Air Date:

Penny gets jealous of the guys' new sexy female neighbor (Valerie Azlynn)

Leonard Plays Laser Obstacle Chess
Watch The Big Bang Theory Season 2 Episode 18
"The Work Song Nanocluster"
Original Air Date:

The boys help Penny with her new business selling Penny Blossoms.

Wolowitz and Summer Glau
Watch The Big Bang Theory Season 2 Episode 17
"The Terminator Decoupling"
Original Air Date:

On a train ride to San Francisco, Leonard, Sheldon, Wolowitz, and Raj discover that Summer Glau is on their train ride.

Wolowitz and Winkle!
Watch The Big Bang Theory Season 2 Episode 16
"The Cushion Saturation"
Original Air Date:

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

Sheldon and Mrs. Hofstadter Sing
Watch The Big Bang Theory Season 2 Episode 15
"The Maternal Capacitance"
Original Air Date:

Leonard's mother, Mrs. Hofstadter (Christine Branksi) comes into town and she ends up being exactly like Sheldon.

Leonard Uses the Board
Watch The Big Bang Theory Season 2 Episode 14
"The Financial Permeability"
Original Air Date:

Sheldon lends Penny some money which makes Leonard go and try and collect some money from her ex-boyfriend Kurt for her.

Sheldon Goes Rock Climbing
Watch The Big Bang Theory Season 2 Episode 13
"The Friendship Algorithm"
Original Air Date:

In order to get time on the super computer at work that he needs for his experiment, Sheldon must befriend Kripke who is in charge of the device.

The Boys and MONTE
Watch The Big Bang Theory Season 2 Episode 12
"The Killer Robot Instability"
Original Air Date:

When Penny's comments about Wolowitz's love life sends him into depression, the boys are about to lose their most important teammate in an upcoming robot fighting competition.

Penny Meets Dave
Watch The Big Bang Theory Season 2 Episode 11
"The Bath Item Gift Hypothesis"
Original Air Date:

It's Christmas time and Sheldon is annoying everyone with his theories on gift giving etiquette. Meanwhile, Leonard gets jealous when Penny stars dating one of his handsome co-workers.

Sheldon and Leonard Discuss the Rules
Watch The Big Bang Theory Season 2 Episode 10
"The Vartabedian Conundrum"
Original Air Date:

When Sheldon and Penny convince Leonard that Stephanie has moved in, Sheldon tries to slow the relationship down.

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TBBT Quotes

Penny: Here's a question-- as an alien pretending to be human, are you planning to engage in any post-prom mating rituals with Amy?
Sheldon: There are post-prom mating rituals?
Penny: Not always. Unless your date drives a van with an air mattress, then always.
Sheldon: Well, if it's part of the prom experience, then I'm open to it.
Penny: You're kidding.
Sheldon: I may be an alien, but I have urges.If Amy wants to copulate by firing her eggs into space, well, then, I will happily catch them with the reproductive sac on my upper flermin. I'm not the best at reading facial cues, but I can see that you're a little turned on.

Leonard: Hi. I'm Leonard. You are beautiful. You pop, sparkle and buzz electric. I'm going to pick you up at eight, show you a night you will never forget.
Raj: Where are we going?