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Leonard suddenly becomes worried when he learns his mother, accomplished psychiatrist and neuroscientist Dr. Beverly Hofstadter (Christine Baranski), is coming to visit. Upon arriving at the building, Beverly meets Penny, and by the time they reach Leonard's apartment, Penny is in tears after having her childhood issues psychoanalysed. Sheldon, on the other hand, instantly develops a comfortable relationship with Leonard's mother, who turns out t...

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