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Series star Mary Tyler Moore made her directorial debut (and swan song) with this episode, which focuses on neurotic TV anchorman Ted Baxter (Ted Knight). It is bad enough when Ted's mother develops a romance with an old duffer named Walter Tewksbury (Nolan Leary). But Ted is really knocked for a loop when Mama Baxter announces that she intends to shack up with Walter without benefit of the clergy's approval. "A Boy's Best Friend" originally aired November 23, 1974.