(2002): A flamboyant look at the rise and fall of legendary producer Robert Evans. This Film Is Not Yet Rated

(2015): Filmmakers discuss how François Truffaut's book on Alfred Hitchcock's techniques influenced the industry. Electric Boogaloo: The Wild, Untold Story of Cannon Films

The most common form, often using a "voice of God" narrator. Observational: Known as "fly-on-the-wall" filmmaking. Participatory: The filmmaker is part of the story.