James Arness Marshal Matt Dillion Actor Milburn Stone Dr. Galen "Doc" Adams Actor Ken Curtis Festus Guest Star John Payne Amos Gentry Guest Star Peter Jason Colt Gentry Guest Star Robert Pine Ben Gentry Guest Star Louise Latham Claire Gentry Guest Star Ron Keefer Floyd Babcock Guest Star Shug Fisher Orly Grimes Guest Star Darlene Conley Leelah Case Guest Star John Flinn Buel Guest Star Robert Totten Abner Guest Star Joseph Dackow Producer Jack Miller Writer Vincent McEveety Director