Summary: The folk music of a world-famous performer as interested in social change as in the history of American roots music.

Summary: A recounting of the versatile and controversial work of one of the most flamboyant African-American writers from the first half of the 20th century.

Summary: An in-depth profile of the talented but troubled star who brought more contemporary issues to soul music.

Summary: Clint Eastwood narrates the history of Warner Bros., which opens with "You Ain't Heard Nothin' Yet (1923-35)," about the studio's first years, when its biggest star was Rin Tin Tin. Also remembered is its move into gritty fare, featuring James Cagney, Edward G. Robinson and Barbara Stanwyck, and its musicals. Included: "The Jazz Singer," "Public Enemy," "42nd Street," "Baby Face" and "Little Caesar"; interviews with Busby Berkeley, Alfred Hitchcock, Robinson and William Wellman.

Summary: "Good War, Uneasy Peace (1935-50)" focuses on how Warner Bros. responded to the Great Depression and World War II, when such stars as Humphrey Bogart, Bette Davis and Errol Flynn graced its pictures. Also: the post-war film noirs are explored. Included: "Casablanca," "Now, Voyager," "The Adventures of Robin Hood," "Kings Row" and "White Heat"; interviews with James Cagney, Howard Hawks, Ronald Reagan and Alexis Smith. Clint Eastwood narrates.

Summary: "A New Reality (1950-70)" details how Warner Bros. fought back against TV with such innovations as CinemaScope and 3-D, as well as with such new stars as Doris Day and James Dean. Also: how a battle between Jack and Harry Warner changed the studio's direction. Included: "A Streetcar Named Desire," "East of Eden," "Cool Hand Luke," "A Face in the Crowd" and "My Fair Lady"; interviews with Warren Beatty, Elia Kazan, Kim Hunter, Arthur Penn and Carroll Baker. Clint Eastwood narrates.

Summary: "Woodstock Notions (1970-89)" recalls the creative renaissance of Warner Bros. during the 1970s and '80s. Included: "Mean Streets," "The Exorcist," "Superman: The Movie," "The Shining" and "Body Heat"; interviews with Dustin Hoffman, Clint Eastwood, Jack Nicholson and Robert Redford. Eastwood narrates.

Summary: "The Big Tent (1980-Present)" chronicles the success of Warner Bros. during the 1980s, '90s and 2000s, including Clint Eastwood's Oscar winners, "The Matrix" franchise and the Harry Potter films. Included: "The Color Purple," "Unforgiven," "Mystic River," "Michael Clayton" and "The Departed"; interviews with Tim Burton, George Clooney, Martin Scorsese and Steven Spielberg. Eastwood narrates

Summary: An intimate portrait of the four Warner brothers and their rise to movie-making greatness.