Rock Milestones: Led Zeppelin's IV zeroes in on Zeppelin's fourth LP, an untitled effort that shot to the top of the charts upon release circa November 8, 1971, and single-handedly shaped the landscape of hard rock over the ensuing decade. Rock Milestones: Led Zeppelin's IV goes behind the scenes to investigate why -- and how -- this album became a decades-long phenomenon and the inestimable impact it made on American music and pop culture in particular.

Few musicals can claim to capture the mood of a historical period as well as the 1972 classic Cabaret. Liza Minnelli's unforgettable portrayal of singer Sally Bowles and the film's stylish recreation of the era have become defining images of Weimar Berlin. In this documentary, actor Alan Cumming explores the truths behind the fiction. He meets many of those closely involved with the original film, including Liza Minnelli, and talks to cabaret artists, among them acclaimed performer Ute Lemper. Alan explores the origins of the Cabaret story in the writings of Christopher Isherwood and uncovers the story of the real life Sally Bowles, a woman very different from her fictional counterpart. He talks to the composer of Cabaret about the inspiration for the film's most famous songs and discovers the stories of the original composers and performers, among them Marlene Dietrich. Finally, Alan reveals the tragic fate of many of the cabaret artists at the hands of the Nazis.

On the eve of the final Off-Broadway performance of the long-running musical "The Fantasticks," filmmaker Eli Kabillio takes a wistful look back at the show's genesis with composer Harvey Schmidt, author Tom Jones and original cast member Jerry Orbach.

E! look at the early career of Christina Aguilera, including how she came to stardom thanks to her exceptional voice and changing up her image at 21.

Following his duel with Alexander Hamilton, Vice President Aaron Burr devises a plan to lead the first secession in US history.