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Penny, Amy, & Bernadette Read Unsettling News
Watch The Big Bang Theory Season 5 Episode 22
"The Stag Convergence"
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Will Wheaton plays a party guest while Bernadette rethinks getting married on The Big Bang Theory.

Stephen Hawking on The Big Bang Theory
Watch The Big Bang Theory Season 5 Episode 21
"The Hawking Excitation"
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Wolowitz gets to work with Stephen Hawking this week, meaning Sheldon will do anything at all to meet his hero.

The Future Mrs. Koothrappali?
Watch The Big Bang Theory Season 5 Episode 20
"The Transporter Malfunction"
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Sheldon is haunted by Mr. Spock on this episode of The Big Bang Theory, as Leonard Nimoy guest voices.

Playing Video Games
Watch The Big Bang Theory Season 5 Episode 19
"The Weekend Vortex"
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Silly Sheldon. This Big Bang Theory character blows off Amy's aunt's birthday this week just to play video game.

What's Up with That Hair?
Watch The Big Bang Theory Season 5 Episode 18
"The Werewolf Transformation"
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Sheldon's barber gets sick this week, while astronaut training causes Wolowitz to rethink his decision to head into space.

Pretty Painting
Watch The Big Bang Theory Season 5 Episode 17
"The Rothman Disintegration"
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Sheldon competes against Kripke this week for a job at the University, while a gift from Amy makes Penny uncomfortable.

Sheldon in the Lab
Watch The Big Bang Theory Season 5 Episode 16
"The Vacation Solution"
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Sheldon tries to take a vacation this week, by working with Amy at her neurobiology lab. Howard, meanwhile, gets all worked up.

Really, Sheldon?!?
Watch The Big Bang Theory Season 5 Episode 15
"The Friendship Contraction"
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Leonard reconsiders his friendship with Sheldon this week due to the latter's demands. Elsewhere, NASA astronaut Mike Massimino as himself.

Fun with Flags
Watch The Big Bang Theory Season 5 Episode 14
"The Beta Test Initiation"
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Leonard and Penny experiment with dating again this week, while Raj develops an odd connection with his phone's virtual assistant.

A Romantic Evening
Watch The Big Bang Theory Season 5 Episode 13
"The Recombination Hypothesis"
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Leonard asks Penny out on a date this week, causing everyone else to wonder how life might change it it goes well. It's the show's 100th episode!

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TBBT Quotes

Stephen Hawking: You made an arithmetic mistake on page two. It was quite a boner.
Sheldon: No, no ... that can't be right. I-I don't make arithmetic mistakes.
Stephen Hawking: Are you saying I do?
Sheldon: Oh, no, no, no, of course not. It's just, I was thinking.... Oh, gosh, golly, I made a boo-boo and I gave it to Stephen Hawking.
Stephen Hawking: Great, another fainter.

Sheldon: Why do you have the Chinese character for "soup" tattooed on your right buttock?
Penny: It's not "soup," it's "courage."
Sheldon: No it isn't. But I suppose it does take courage to demonstrate that kind of commitment to soup.
Penny: How'd you see it? You said you wouldn't look.
Sheldon: Sorry. As I told you, the hero always peeks.