Eight Is Enough: Cast Rate: –☹️ Very Bad🙁 Bad😐 Average🙂 Good😃 Excellent🤩 Super! ★ Save Rating✔ Rating Saved! Notify me: –about new episodeabout new seasonabout end of season Subscribe✔ Subscription Saved! Eight Is Enough Comedy, Drama, Family 3/15/77 – 5/23/81 United States GeneralEpisodesCastCharactersGallery Cast See full cast → Dick Van Patten as Tom Bradford Dick Van Patten as Tom Bradford Diana Hyland as Joan Wells Bradford Betty Buckley as Sandra Sue "Abby" Abbott Bradford Mark Hamill as David Bradford Grant Goodeve as David Bradford Lani O'Grady as Mary Bradford Laurie Walters as Joanie Bradford Susan Richardson as Susan Bradford Dianne Kay as Nancy Bradford Connie Needham as Elizabeth Bradford Willie Aames as Tommy Bradford Willie Aames as Tommy Bradford Adam Rich as Nicholas Bradford