Jack discovers that the prisoner the Marshal was escorting is Kate. The Marshal is dying and Jack can't stop it. Sawyer tries to end the Marshal's misery, but botches the job and Jack has to finish.
Jack and Hurley Help the Marshal
From Bonnie Covel, About.com
Jack Shepard (Matthew Fox), Hurley (Jorge Garcia), and Marshal Edward Mars (Fredric Lehne)
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