Supernatural will go back in time to spend an episode on a WWII submarine January 19, 2016 News, News Click here for the complete article from EW. 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