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Dr. Nicholson is a character in Young Sheldon. He worked as a doctor in Medford, Texas. In 1991, he had seen Amanda McAllister as a patient; he told her that her blood pressure is high and should have a week long bed rest. He also revealed he knew about the Gambling den behind the Video Village and Medford Wash. (Ruthless, Toothless and a Week of Bed Rest)

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