A squabble over the thermostat setting leads to Leonard going over to Penny's and recounting for her the story of how he met and moved in with Sheldon.
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Howard and Raj try to find the perfect match for Sheldon by setting him up on an Internet dating site. Seeing her new boyfriend interact with the gang makes it clear to Penny that she can't go back to dating dumb jocks after dating Leonard.
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Howard uses a robotic arm for his own pleasureand Sheldon goes on a date with Amy Farrah Fowlerhis first date everand Penny finds herself accompanying them.
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Sheldon calculates that he'll be dead before technology exists to download his consciousness into a robotso 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 galaan aged but wealthyCaltech donor makes Leonard ponder if he's willing to have sex with her to secure another donation.
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