Penny: What the hell is that?
Leonard: What was it doing on the ceiling?
Wolowitz: That's classified.
After Sheldon mentions a molecular sieve, they go over to 4a, their apartment. 4a is a kind of molecular sieve. See more...
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The entry you are changing the episode of is:
|Title||The Big Bang Theory|
|Original entry||When Leonard and Sheldon are sitting in the sperm bank waiting area, the position of Sheldon's bag strap keeps changing.|