CW to re-air Supernatural’s ‘Blood Brother’ on August 7 July 19, 2013 News CW will re-air Supernatural’s ‘Blood Brother’ on August 7. Click here for episode information. 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