Supernatural season nine, episode 16, "Blade Runners," advances the main arc as the Winchesters team with a detoxing Crowley to locate the First Blade. Praised for its intense performances and plot development, the episode highlights the dark, transformative influence of the Mark of Cain on Dean Winchester. Read a detailed review at The Geekiary . Supernatural Season 9 Episode 16 Review - Blade Runners