Lorne Greene Ben Cartwright Actor Michael Landon Little Joe Cartwright Actor Dan Blocker Eric "Hoss" Cartwright Actor Pernell Roberts Adam Cartwright Actor Steve Rowland Guest Star Mort Mills Guest Star Simon Scott Guest Star Bill Quinn Guest Star Whitney Blake Guest Star John Milford Guest Star William Pullen Guest Star Maurice Manson Guest Star James Gavin Guest Star Harry Carey Jr. Guest Star James W. Lane Executive Producer David Dortort Producer Robert E. Thompson Writer Joseph Kane Director