Lorne Greene Ben Cartwright Actor Michael Landon Little Joe Cartwright Actor Dan Blocker Eric "Hoss" Cartwright Actor Pernell Roberts Adam Cartwright Actor Inger Stevens Guest Star John Larch Guest Star Bob Knapp Guest Star George J. Lewis Guest Star Charles Maxwell Guest Star Troy Melton Guest Star Byron Foulger Guest Star Diane Grey Guest Star Jon Lormer Guest Star Martin Mason Guest Star James W. Lane Executive Producer David Dortort Producer Thomas Thompson Writer Christian Nyby Director