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Ostensibly because John (Ralph Waite) has been working too hard, Olivia (Michael Learned) suggests that he go on a vacation with her to Virginia Beach. In truth, Olivia must go to the beach clinic to undergo some medical tests. Diagnosed with tuberculosis, she is advised to leave home and enter a sanitarium in Arizona -- but how can she break this news to her family? Meanwhile, Ben (Eric Scott) tries to expand his "saleable" skills; and Elizabeth (Kami Cotler) can't understand why her cakes don't taste as good as Grandma's. Neva Pattersonis seen as Olivia's Aunty Kate, a role previously played by Louise Latham. This episode marks the last regular series appearance by Michael Learned (Olivia), though she would return for a few scattered episodes in Season Eight.