Watch the trailer for I Knew It Was You: Rediscovering John Cazale. For more HBO Documentary Films, go to http://itsh.bo/goUrjK Watch HBO Documentary Films online at HBO GO® http://itsh.bo/kUIs4w. With HBO GO, you can watch every HBO Documentary Film on your iPad® (http://itsh.bo/hbogoapple), iPhone® (http://itsh.bo/hbogoapple) or Android™ (http://itsh.bo/hbogoandroid) smartphone. Free with your HBO subscription through participating TV providers. Connect with HBO Docs on Facebook & Twitter: http://www.facebook.com/hbodocs http://www.twitter.com/hbodocs