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When Leonard and Sheldon are walking downstairs, Sheldon stops and pins back up the caution tape that is in front of the elevator. Between shots, the other strip of caution tape untwists itself. See more...
Trivia
When Leonard, Howard and Raj are contemplating who to have as the fourth member of their Physics Bowl team, Raj says, "You know who's apparently very smart is the girl who played TV's 'Blossom'. She got a Ph.d in Neuroscience or something." The girl he's referring to is actress Mayim Bialik, who plays Amy Farrah Fowler in later episodes of The Big Bang Theory. Interestingly, she is the only recurring cast member on the show that actually does have a Ph.d in real life. See more...
The Big Bang Theory (2007) - 15 quotes
starring Jim Parsons, Johnny Galecki, Kaley Cuoco, Kunal Nayyar, Simon Helberg (add more)
The Loobenfeld Decay (series 1)
Leonard: I already lied. Why cover it up with another lie?
Sheldon Cooper: Because your lie was painfully transparent, whereas my lie is exquisitely convoluted. While you were sleeping, I was busy weaving an un-unravelable web.
Penny: Sheldon, have you any idea what time it is?
Sheldon Cooper: Of course I do. My watch is linked to the atomic clock in Boulder, Colorado. It's accurate to one-tenth of a second. But as I'm saying this, it occurs to me that you may have again been asking a rhetorical question.
The 21-Second Excitation (series 4)
Bernadette: I really love Howard's chest hair.
Penny: Howard has chest hair?
Bernadette: No, just the one, but it's really long.
The Guitarist Amplification (series 3)
Sheldon Cooper: Leonard, when that woman moved in three years ago, I told you not to talk to her, and now look, we're going to be late for the movies.
Penny: Wow, Sheldon. I had no idea you made a board game.
Sheldon Cooper: Oh, Research Lab is more than just a board game. As it says in the box, "the physics is theoretical, but the fun is real."
Leonard Hofstadter: We must not be playing it right.
Pilot (series 1)
Leonard: We need to widen our circle.
Sheldon: I have a very wide circle. I have 212 friends on MySpace.
Leonard: Yes, and you've never met one of them.
Sheldon: That's the beauty of it.
Sheldon: You're not done with her, are you?
Leonard: Our babies will be smart AND beautiful.
Sheldon: Not to mention imaginary.
Penny: So, what do you guys do for fun around here?
Sheldon: Well, today we tried masturbating for money.
Penny: Four years I lived with him! Four years, I mean that's like as long as high school!
Sheldon: It took you FOUR YEARS to get through high school?
Sheldon: You participate in the mass cultural delusion that the sun's apparent position relative to arbitrarily defined constellations at the time of your birth somehow effects your personality.
Sheldon: I'm not insane! My mother had me tested!
Sheldon: Oh, well, this would be one of those circumstances that people unfamiliar with the law of large numbers would call a coincidence.
The Lizard-Spock Expansion (series 2)
Howard Wolowitz: If it's "creepy" to use the Internet, military satellites, and robot aircraft to find a house full of gorgeous young models so I can drop in on them unexpected, then FINE, I'm "creepy".
Sheldon: You have about as much chance of going out with Penny as the Hubble Telescope has of finding that at the center of each black hole there's a little man with a flashlight trying to find the circuit breaker.
Sheldon: Oh Gravity, thou art a heartless bitch.