Justified, "Long in the Tooth"
In its early days, "Justified" waxed and waned between serialized episodes and standalone ones, which seemed fitting for a show whose hero had been featured in both novels and short stories by Elmore Leonard. Eventually, the fans clamored for more and more arc-driven storytelling, which was a treat when that season's villain was vibrant (Mags Bennett, Robert Quarles), but problematic when the show was stuck following a less compelling foe (Daryl Crowe). "Long in the Tooth" borrows elements from a couple of Leonard stories (but primarily the novel "Pronto") as Raylan and Rachel pursue a wiseguy-turned-dentist as he tries to cross the border into Mexico before the marshals or killers from his old crew can track him down. It has nothing to do with Raylan's concerns about the Crowder family (season 1 had more standalone episodes than most in part because Walton Goggins was working on a movie for half the season), but it's a wonderful showcase for Raylan as a smart, funny, quick-drawing hero.