James Arness Marshal Matt Dillion Actor Milburn Stone Dr. Galen "Doc" Adams Actor Ken Curtis Festus Guest Star Buck Taylor Newly Guest Star Ted Jordan Nathan Burke Guest Star Roy Roberts Mr. Bodkin Guest Star Earl Holliman Will Smith Guest Star Jacqueline Scott Abelia johnson Guest Star Susan Olsen Marianne Johnson Guest Star Mike Durkin Jonathan Johnson Guest Star Val Avery Bull Anders Guest Star William Fawcett Old Prospector Guest Star Joseph Dackow Producer Calvin Clements Sr. Writer Vincent McEveety Director