Sheldon calculates that he'll be dead before technology exists to download his consciousness into a robot, so he goes on a binge of healthy living and ultra-safety.
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Sheldon meets Amy Farrah Fowler's mother and comes to the realization he no longer wants to see Amy; and Leonard realizes everyone is in a relationship except for him.
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The rest of the gang is interviewed by the FBI for Wolowitz's security clearance with Sheldon accidentally letting slip some damaging information.
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The guys camp out in line to see a print of Raiders of the Lost Ark with :21 extra seconds and are outraged to see Wil Wheaton and his friends being allowed to skip the line. Penny and Bernadette invite Amy to their girls night.
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Their friendship becomes strained when Sheldon tries to take over Leonard's creation of a smartphone application that solves differential equations.
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After meeting at a fundraising gala, an aged but wealthy, Caltech donor makes Leonard ponder if he's willing to have sex with her to secure another donation.
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Howard contemplates a serious decision in his relationship with Bernadette; and Leonard and Raj's sister start seeing each other again.
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About
Leonard and Sheldon are brilliant physicists, the kind of ''beautiful minds'' that understand how the universe works. But none of that genius helps them interact with people, especially women. All this begins to change when a free-spirited beauty named Penny moves in next door.
