Lorne Greene Ben Cartwright Actor Michael Landon Little Joe Cartwright Actor Dan Blocker Eric "Hoss" Cartwright Actor Pernell Roberts Adam Cartwright Actor Sean McClory Guest Star Nels P. Nelson Guest Star Harry Monte Guest Star Clegg Hoyt Guest Star Robert Sorrells Guest Star Felix Silla Guest Star Roger Arroyo Guest Star Frank Delfino Guest Star Cosmo Sardo Guest Star James W. Lane Executive Producer David Dortort Producer Robert V. Barron Writer John Florea Director