Building the Channel Tunnel: 25 Years On

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.

For the 20th anniversary of "Titanic," James Cameron reopens the file on the disaster.

The history of cinematic sound, told by legendary sound designers and visionary filmmakers.

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.

An unprecedented and intimate look at the life, work and enduring legacy of British actress Audrey Hepburn (1929-1993).

A look behind the lens of Christopher Nolan's space epic.

Journey into the extraordinary world of "The Witcher" — from casting the roles to Jaskier's catchy song — in this behind-the-scenes look at the series.

Filmed over 14 months with unprecedented access into the inner circle of the man and the sport, this is the first official and fully authorised film of one of the most celebrated figures in football. For the first time ever, the world gets vividly candid and un-paralleled, behind-closed-doors access to the footballer, father, family-man and friend in this moving & fascinating documentary. Through in-depth conversations, state of the art football footage and never before seen archival footage, the film gives an astonishing insight into the sporting and personal life of triple Ballon D'Or winner Cristiano Ronaldo at the peak of his career. From the makers of ‘Senna’ and ‘Amy’, Ronaldo takes audiences on an intimate and revealing journey of what it’s like to live as an iconic athlete in the eye of the storm.

A look at the story behind Marvel Studios and the Marvel Cinematic Universe, featuring interviews and behind-the-scenes footage from all of the Marvel films, the Marvel One-Shots and "Marvel's Agents of S.H.I.E.L.D."!

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.

Featuring never-before-seen footage, this documentary delivers a startling new look at the Peoples Temple, headed by preacher Jim Jones who, in 1978, led more than 900 members to Guyana, where he orchestrated a mass suicide via tainted punch.

Explore how writers Steven Moffat and Mark Gatiss created the hit television sensation. Take a personal voyage through the versions of Holmes that have served as inspirations for the new series - the original stories, their factual origins, hundreds of film adaptations - to arrive at their thoroughly modern Sherlock. Moffat and Gatiss explain the challenges they encountered adapting the original adventures of the iconic super-sleuth. Go behind the scenes on the set of the hit television series, including interviews with actors Benedict Cumberbatch, Martin Freeman and Lara Pulver, who talk about the reinvention of their fictional characters.