When Sheldon visits his Mom (Laurie Metcalf) in Houston, he is forced to confront a new reality. Meanwhile, Raj's 'Murder Mystery' party starts some fights within the gang. (TV-14 D, L)
After the guys can't get Comic-Con tickets, Sheldon tries to hold his own convention and winds up spending a wild night with James Earl Jones. Meanwhile, the girls see if they can act like "grown-ups." James Earl Jones and Carrie Fisher appear as themselves. (TV-PG L)
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