Supernatural new promo clip February 22, 2009 News Click here for "The Greatest Evil," the series new promo clip on cwtv.com. Spoilers alert! Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Reddit (Opens in new window) Related