Roddy McDowall Galen Actor Ron Harper Alan Virdon Actor James Naughton Pete Burke Actor Mark Lenard Urko Actor Booth Colman Guest Star Pat Renella Guest Star Royal Dano Guest Star Ron Stein Guest Star Martin E. Brooks Guest Star John Hoyt Guest Star Wayne Foster Guest Star John Milford Guest Star Biff Elliot Guest Star William Beckley Guest Star Eldon Burke Guest Star Tom McDonough Guest Star Peter Ireland Guest Star Norman Burton Guest Star Victor Kilian Guest Star Shelley Snell Guest Star Edward J. Lasko Writer Robert W. Lenski Writer Walter Black Writer Arthur Browne Jr. Writer David P. Lewis Writer Anthony Lawrence Writer Howard Dimsdale Writer Barry Oringer Writer Richard Collins Writer Booker Bradshaw Writer