When a stranger walks into Dodge City looking for information about a Mr and Mrs John Krale, Matt informs him that John passed away a few years ago, and that his wife had been running the ranch alone ever since. The man says that he is their long, lost son, Billy Krale, and that he ran away from home seventeen years ago. The thing is, a few years ago, Mrs Krale asked Matt to trail her son, and he did it. He didn't have the heart to tell her that her son had joined the Union Army at the start of the war, and was killed in action at the Battle of Shiloh. So whoever this man in town is right now, it's definitely not Billy Krale...