The Mentalist Season 5 Theories: Who is Red John? April 8, 2013 Featured, The Mentalist, TV Chat My last video review of The Mentalist “Behind the Red Curtain” Season 5 episode 18 yielded a lot of questions and speculations on whether Kirkland was Red John or not. As a way of organizing things a bit and also providing my own thoughts and theories, I put together this little video where I compile the answers from the fans and respond to them. Check it out and make sure to click the “Like” button if you have enjoyed this video. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Google+ (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Pocket (Opens in new window)