What Killed the Roman Empire?

Director Claude Lanzmann spent 11 years on this sprawling documentary about the Holocaust, conducting his own interviews and refusing to use a single frame of archival footage. Dividing Holocaust witnesses into three categories – survivors, bystanders, and perpetrators – Lanzmann presents testimonies from survivors of the Chelmno concentration camp, an Auschwitz escapee, and witnesses of the Warsaw Ghetto Uprising, as well as a chilling report of gas chambers from an SS officer at Treblinka.

A documentary on the expletive's origin, why it offends some people so deeply, and what can be gained from its use.

He's devoted his career to uncovering stories the powerful want buried. From My Lai to Abu Ghraib, dig into the life's work of journalist Seymour Hersh.

The film is based on interviews with 2,000 women from 50 countries, and covers the status of women all over the world. The topics covered include forced marriages, sexual assault, female genital mutilation, acid attacks, motherhood, sexuality, menstruation, education and the professional success of women.

After another 7 year wait, director Michael Apted revisits the same group of British-born children from Seven Up! and 7 Plus Seven. The subjects are interviewed as to the changes that have occurred in their lives during the last seven years.

In 1997, Louis Theroux made a documentary about the world of male porn performers in Los Angeles. 15 years later, he returns to find a business struggling with the deluge of free porn on the internet. Louis revisits some of the original programme's contributors as well as meeting the latest crop of porn performers dreaming of porn stardom.

Experience the events of September 11, 2001 through the eyes of President Bush and his closest advisors as they personally detail the crucial hours and key decisions from that historic day.

Director Michael Apted revisits the same group of British-born adults after a 7 year wait. The subjects are interviewed as to the changes that have occurred in their lives during the last seven years.

This documentary delves into the mysteries surrounding the Neanderthals and what their fossil record tells us about their lives and disappearance.

Director Michael Apted revisits the same group of British-born adults after a 7 year wait. The subjects are interviewed as to the changes that have occurred in their lives during the last seven years.

National Geographic's riveting effort recounts all 12 crewed missions using only archival footage, photos and audio.

A group of British children aged 7 from widely ranging backgrounds are interviewed about a range of subjects. The filmmakers plan to re-interview them at 7 year intervals to track how their lives and attitudes change as they age.