Lewis Black guest stars as an entomologist on The Big Bang Theory and he helps settle a bet between Sheldon and Wolowitz.
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Wolowitz and Sheldon make a high stakes bet (some of their best comic books) over who's right on the species of a cricket they heard.
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In order to settle a bet, Sheldon, Wolowitz and Raj search out the cricket to identify its species.
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Hairy Leonard is very eager to see Penny upon his return from their three month expedition and is a little upset at Sheldon for crashing their good makeup time.
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Sheldon comes crawling back to his mother's home in the season three premiere of The Big Bang Theory when his arctic expedition doesn't go as planned.
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So what do you think of Sheldon with a little facial hair? You're going to get a chance to see him with a goatee in the season three premiere of The Big Bang Theory.
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Sheldon and Penny will never get together. Jim Parsons says these characters are just too good of friends.
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Sheldon is angry at Stuart for ruining the latest Hellboy comic book for him with the spoiler of "it's mind blowing." He tries to get his revenge by ruining the latest issue of The Flash.
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In erhaps the most ridiculous situation, Sheldon ends up sleeping in Penny's bed... and somehow this doesn't make the man happy! We'll trade places with you...
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When Sheldon crashes in on Stuart (Kevin Sussman) and Penny's date, he ends up arguing with Stuart on comic books until they put Penny and Stuart's chances of getting lucky to sleep.
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Leonard and Sheldon greet their new neighbor, Alicia (Valerie Azlynn) as she moves into their building right above their apartment. Sheldon drills her with his usual awkward questions like does she like area rugs?
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Penny brings in Chinese for the guys and hangs out in her sweats. Don't worry, for now Wolowitz still thinks she looks ravishing. It's only when the new neighbor shows up does Penny need to step it up.
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TBBT Quotes

Penny: Hey, Sheldon, did you change your Wi-Fi password again?
Sheldon: Yes, it's "Penny, get your own Wi-Fi." No spaces.

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.