Lorne Greene Ben Cartwright Actor Michael Landon Little Joe Cartwright Actor Dan Blocker Eric "Hoss" Cartwright Actor Pernell Roberts Adam Cartwright Actor Buddy Ebsen Guest Star Fay Spain Guest Star Jean Willes Guest Star Malcolm Atterbury Guest Star John Stephenson Guest Star Charles Meredith Guest Star Clarke Alexander Guest Star Bill Clark Guest Star Bob Miles Guest Star James W. Lane Executive Producer David Dortort Producer Carey Wilber Writer Christian Nyby Director