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Leonard, realizing his pursuit of Penny is fruitless, has an unexpected encounter with a fellow scientist (Sara Gilbert).
Leonard, realizing his pursuit of Penny is fruitless, has an unexpected encounter with a fellow scientist (Sara Gilbert).
More episodes
The Big Bang Theory
S4, EP18 "The Prestidigitation Approximation"Leonard has to choose between Penny and his new girlfriend, Priya; Howard's magic trick drives Sheldon crazy.
The Big Bang Theory
S5, EP8 "The Isolation Permutation"Amy is devastated when Penny and Bernadette shop for wedding dresses without her.
The Big Bang Theory
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.
The Big Bang Theory
S2, EP8 "The Lizard-Spock Expansion"Leonard inadvertently steals away the new woman Wolowitz thinks is the love of his life.
The Big Bang Theory
S11, EP6 "The Proton Regeneration"Sheldon auditions for the role of the new Professor Proton; Penny takes care of Halley when Bernadette and Wolowitz need bed rest.
