- Wyatt Earp: [Opening Narration] Wyatt Earp's little brother, Morgan, was a charming, devil-may-care buckaroo. When he came under the influence of Dr. John H. Holliday, Wyatt had a problem. Although Wyatt and Doc were friends, Marshal Earp knew Doc for what he was - an embittered adventurer with a strange code. If a youngster like Morgan Earp started hero-worshipping Doc Holliday, he was mighty apt to play for it with his life.