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Sheldon\'s mother, Mary (Laurie Metcalf), has come to visit from her home in Texas. He is excited and plans to get her to cook some of his favorite food and attend a lecture of 2011 Nobel Prize laureate Saul Perlmutter with him. Leonard offers instead to take her out to dinner. Mrs. Cooper also opts to go sightseeing with the group rather than visiting the lecture with her son. Sheldon becomes jealous and is angry that she is ignoring him and ...

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