What makes a viewer "trust" the moving image? What constitutes "reality" on the silver screen? Such luminous figures in nonfiction filmmaking as Errol Morris, Werner Herzog, Albert Nick Broomfield, and many others are seen in interviews discussing their craft in a documentary that also includes scenes from classics such as "The Thin Blue Line," "Touching the Void," "Little Dieter Needs to Fly," and more. 97 min. Standard; Soundtrack: English Dolby Digital stereo; featurettes. Two-disc set.