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THREE'S COMPANY - 'And Mother Makes Four' - Airdate: March 24, 1977. (Photo by ABC Photo Archives/ABC via Getty Images)SUZANNE SOMERS;AUDRA LINDLEY;NORMAN FELL

THREE'S COMPANY - 'And Mother Makes Four' - Airdate: March 24, 1977. (Photo by ABC Photo Archives/ABC via Getty Images)SUZANNE SOMERS;AUDRA LINDLEY;NORMAN FELL