- Wyatt Earp: [Opening Narration] Marshal Earp thought he knew Old Man Clanton and all his tribe. But he had forgotten Billy Clanton, the youngest son away in Texas at school. Billy's sister, Emma, had high hopes that Billy would be different from the other Clantons; and Wyatt, when he was forced to remember about Billy, understood Emma's problem - could the boy be saved from the life of an outlaw family as notorious as the Clantons?