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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?
S1, EP1 "Pilot"
Leonard is happy to meet new neighbor Penny, but his roommate thinks he is chasing an impossible dream.
S1, EP2 "The Big Bran Hypothesis"
Leonard volunteers to sign for a package, hoping to make a good impression on Penny.
S1, EP3 "The Fuzzy Boots Corollary"
Unhappy to learn that Penny is seeing someone, Leonard summons the courage to ask another woman on a date.
S1, EP4 "The Luminous Fish Effect"
Getting fired gives Sheldon the opportunity to explore life beyond physics, but when he spends his time weaving ponchos and acting like a shut-in, Leonard calls Sheldon's mother for assistance.
S12, EP24 "The Stockholm Syndrome"
Bernadette and Wolowitz leave their kids for the first time; Penny and Leonard try to keep a secret; Sheldon and Amy stick together; Koothrappali makes a new friend; the gang travels together into an uncharted future.
S12, EP23 "The Change Constant"
Sheldon and Amy await big news.
