Lorne Greene Ben Cartwright Actor Michael Landon Little Joe Cartwright Actor Dan Blocker Eric "Hoss" Cartwright Actor Pernell Roberts Adam Cartwright Actor Ruth Roman Guest Star Don Megowan Guest Star Mauritz Hugo Guest Star Hal Smith Guest Star Roy Jenson Guest Star William Mims Guest Star Fay Roope Guest Star Nancy Root Guest Star James W. Lane Executive Producer David Dortort Producer Donald S. Sanford Writer Christian Nyby Director