Lonesome Dove: The Series

Ballad of a Gunfighter (1x9)

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After an altercation with a gunslinger, Austin believes it was his bullet who killed the man. The town begins to treat him like a hero, and he takes on a gunfighter's persona, which greatly pleases his new girlfriend. It is fairly short lived however when Clay informs him that he thinks it was someone else who killed the man, and that Austin was basically making a fool of himself playing the part of a gunfighter. Meanwhile, Newt and an undercover Pinkerton agent, Murphy (the man who REALLY killed the gunfighter), infiltrate the Irish gang that he was sent to capture.