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In page Joan Blackman:

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Blackman made her television-acting debut as a guest performer in a 1957 series, Hawkeye and the Last of the Mohicans,[citation needed] but "her first TV dramatic role"[1] and "the first acting assignment she's ever had" was in the "Disappearance" episode of Turn of Fate in 1958.[2] Among her television appearances was her role as Hilary Gray in the 1964 Perry Mason episode "The Case of the Ruinous Road". She also made single appearances in Bonanza, I Spy, and Gunsmoke.