Official CW synopsis for Supernatural’s Season Ten Finale, ‘Brother’s Keeper’ May 2, 2015 Updates CW has released the episode information for Supernatural’s season ten finale, ‘Brother’s Keeper.’ Click here for the episode synopsis. 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