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Picture 4 / 8

Picture 4 / 8

'The Maternal Congruence' - Season 3, Episode 11

Leonard's mother, Dr. Beverly Hofstadter, visits for Christmas. His mother's visit is distressing for Leonard, especially when she finds out about his relationship with Penny, but not for Sheldon, who appreciates her analytical thinking.

Air Date: December 14, 2009.

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