All series long, Raylan Givens goes up against the meanest scum Harlan County (and beyond) has to offer. But as violent and brutal as many of them are, Raylan never faces anyone who can go toe-to-toe with him as a gunfighter – until the show's final season, that is. Here, he comes face-to-face with Avery Markham's slickest hired gun, a mysterious old-school outlaw named Boon.
In many ways, Boon is a dark mirror of Raylan himself: He's the kind of man he might have become if he'd never put on a badge. Like Raylan, Boon's a snarky, swaggering gunslinger, and the fastest draw around. But Boon has no scruples, though he also has no desire to take over the criminal underworld, or even get rich. All Boon wants is to show off just how good he is with a six-shooter, which makes him a formidable foe when he comes gunning for Raylan.
Though the big bad of Season 6 is Avery Markham and the final episode sees the ultimate stand-off between Givens and Boyd Crowder, it's actually Boon who gives the lawman the biggest run for his money. Boon and Raylan engage in a quick-draw showdown on an open stretch of highway, from which only one man walks away.