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When she trips on one of Jerry's toys, Vivian (Vivian Vance) sustains a slight injury. She is willing to forget her pain until Lucy (Lucille Ball), who has neglected to renew her liability insurance, nervously intimates that Viv might try to sue her. To teach Lucy a lesson for even imagining such a thing, Viv pretends to be more seriously injured than she is--and in true Man Who Came to Dinner fashion, poor Lucy is run ragged waiting on her "invalid" friend hand and foot! This episode marks the final appearance of Charles Lane as banker Mr. Barnsdahl.