Wyatt Earp: [Opening Narration] The murder of Nate Strathearn, relative and U.S. Marshal, brought to Wyatt Earp a personal challenge. Later on in his career, men nearer and dearer to Wyatt were to be killed or wounded. But not since the slaying of his friend, Mr. Brother, had Wyatt been so emotionally involved. It did not make for clear thinking.