The Lone Ranger (1949)

Season 1: Episode 11

A tenderfoot stage coach driver is killed then one of his murderers takes his place driving the coach. The Lone Ranger and Tonto come across the scene and realize the boy is still alive and arrange for medical care while covering up the boy is still alive. The Lone Ranger then goes on a quest to find out who the boy is and what was so important that someone would want him dead.