Go Set a Watchman was written before Lee's beloved masterpiece, as director Mary McDonagh Murphy explains in this update of her 2011 documentary "Hey, Boo: Harper Lee & To Kill a Mockingbird." Murphy's film, "Harper Lee: From Mockingbird to Watchman," sifts through the facts and speculation surrounding Lee and both her novels, and includes interviews with Lee's older sister, close friends, and admirers. 83 minutes.