The Big Bang Theory (TV Series)

The Alien Parasite Hypothesis (2010)

Jim Parsons: Sheldon Cooper

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Quotes 

• Sheldon Cooper : What is the best number? By the way, there's only one correct answer.

  Raj Koothrappali : Five million, three hundred eighteen thousand and eight?

  Sheldon Cooper : Wrong. The best number is 73. You're probably wondering why.

  Howard Wolowitz : No.

  Raj Koothrappali : We're good.

  Sheldon Cooper : 73 is the 21st prime number. Its mirror, 37, is the 12th, and its mirror, 21, is the product of multiplying - hang on to your hats - seven and three. Heh? Heh? Did I lie?

  Leonard Hofstadter : We get it. 73 is the Chuck Norris of numbers.

  Sheldon Cooper : Chuck Norris wishes. In binary, 73 is a palindrome: 1001001, which backwards is 1001001. Exactly the same. All Chuck Norris backwards gets you is "sirron kcuhc."

  Raj Koothrappali : Just for the record, when you enter 5,318,008 in a calculator, upside down, it spells "boobies."

• Sheldon Cooper : Aren't you slicing that man's brain a little too thin?

  Amy Farrah Fowler : It's too thin if I were making a foot-long brain sandwich at Quizno's. For examination under a two photon microscope, it's fine.

  Sheldon Cooper : Well, you're the expert. If the correct way to do it is the wrong way, then I yield.

  Amy Farrah Fowler : Very well. If you die and donate your body to science, I promise to slice your brain like Canadian bacon.

• Sheldon Cooper : What were the symptoms?

  Amy Farrah Fowler : Elevated heart rate, moist palms, dry mouth, and localized vascular throbbing.

  Sheldon Cooper : Localized to what region?

  Amy Farrah Fowler : Ears and genitalia.

  Sheldon Cooper : Interesting. Not body parts that usually team up.

• Sheldon Cooper : Possible explanations for your symptoms are, in descending order of likelihood: hyperthyroidism, premature menopause, hosting an alien parasite, or, and I only include it for the sake of covering absolutely all bases... sexual arousal.

  Amy Farrah Fowler : Where would I have picked up an alien parasite?

• Penny : Are you saying that Amy is... oh, what's the scientific word...

  Sheldon Cooper : Forget science. She's horny.

• Amy Farrah Fowler : Sheldon, I am not going through menopause!

  Sheldon Cooper : Are you sure? You said that with the testy bark of an old biddy.

• Penny : I'm suggesting there might be something you could do about Amy's... urges.

  Sheldon Cooper : It's illegal to spay a human being.

• Sheldon Cooper : Clarify something for me. Isn't the point of a communal meal the exchange of ideas and opinions? An opportunity to consider important issues of the day?

  Leonard Hofstadter : It is. You just kind of put a damper on things when you said, "The next person I see talking with food in their mouth will be put to death."

• Amy Farrah Fowler : I think we need to face the cold hard truth. I was sexually aroused by Penny's friend, Zack.

  Sheldon Cooper : Hang on, I don't know that we've given the alien parasite hypothesis a fair shake.