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The Big Bang Theory
Mensa-fied best friends and roommates Leonard and Sheldon, physicists who work at the California Institute of Technology, may be able to tell everybody more than they want to know about quantum physics, but getting through most basic social situations, especially ones involving women, totally baffles them. How lucky, then, that babe-alicious waitress/aspiring actress Penny moves in next door. Frequently seen hanging out with Leonard and Sheldon are friends and fellow Caltech scientists Wolowitz and Koothrappali. Will worlds collide? Does Einstein theorize in the woods?
S9, EP5 "The Perspiration Implementation"
Barry Kripke expresses interest in Amy while leading a fencing lesson for the guys; when Stuart tries to attract female customers to the store, Penny, Amy and Bernadette help out.
S2, EP1 "The Bad Fish Paradigm"
Penny's first date with Leonard goes awry; Penny finds Sheldon to be an unwilling confidant.
S1, EP13 "The Bat Jar Conjecture"
When Sheldon tries to prove his mental superiority as they train for the Physics Bowl, the guys kick him off the team and bring his nemesis (Sara Gilbert) aboard.
S1, EP17 "The Tangerine Factor"
When Leonard finally works up the courage to ask Penny out on a date, they each turn to Sheldon for advice.