Farrah Fawcett in the episode "The Sound of Money":
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Jaclyn Smith in the episode "When Mother Gets Married":
https://m.media-amazon.com/images/M/MV5BNmEwMzdiZTYtMjc1ZC00OTk2LWE3MDUtMjk5NzcwYTkxYzc0XkEyXkFqcGdeQXVyMjA5MDExMDE@._V1_.jpg

And Cheryl Ladd (billed under her maiden name of Cheryl Stoppelmoor) in the episode "Double Trouble":
https://m.media-amazon.com/images/M/MV5BNDExMDBhYTAtNTY2Yi00YjQxLWExNzYtMzUyMjYxMWFiMDZhXkEyXkFqcGdeQXVyMzI3NTM1OQ@@._V1_.jpg