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Sheldon begins volunteering as a docent at a local train museum. His enthusiasm for trains, however, quickly turns into a struggle for control when he finds himself at odds with his supervisor, who insists on rules that Sheldon deems inefficient. This subplot highlights Sheldon's lifelong difficulty with authority and social boundaries, as he struggles to understand that his superior intelligence doesn't automatically grant him leadership in a workplace setting. Missy’s New Chapter young sheldon s04e02 240p