Dick Van Patten Tom Bradford Actor Betty Buckley Sandra Sue Abbott "Abby" Bradford Actor Adam Rich Nicholas Bradford Actor Willie Aames Tommy Bradford Actor Connie Needham Elizabeth Bradford Actor Dianne Kay Nancy Bradford Actor Susan Richardson Susan Bradford Stockwell Actor Laurie Walters Joannie Bradford Actor Lani O'Grady Mary Bradford Actor Grant Goodeve David Bradford Actor Joan Prather Janet Bradford Actor Michael Thoma Dr. Greg Maxwell Actor Brian Patrick Clarke Merle "The Pearl" Stockwell Actor Virginia Vincent Daisy Maxwell Actor Rick Casorla Guest Star Emmaline Henry Guest Star Robert Rockwell Guest Star Stephen Keep Mills Guest Star Joshua Grenrock Guest Star Harry Harris Director Sandra Kay Siegel Writer