Supernatural Preview: Grandpa Winchester’s Arrival Brings the Family Mythology ‘Full Circle’ January 29, 2013 News Click here for TV Line’s preview of this week’s episode of Supernatural. SPOILERS! 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