I keep warning that the final episodes of this great series are likely to serve up surprises and shocks – but even I was unprepared for the sudden turn of events in last week’s show, which found Raylan, Boyd and Ava in the same scene, with Boyd’s ill-gotten gains, Raylan’s determination to arrest him, and Ava’s sudden trump card, which had her becoming the number one fugitive on Raylan’s list, and everyone else’s.