The Intruder: He's Watching You From Within

A string of threatening emails escalates into a revenge plot involving a newly married US marshal and his ex-girlfriend.

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.

Unravel the case of Utah therapist Jodi Hildebrandt, whose child abuse arrest with parenting YouTuber Ruby Franke exposed a twisted tale of manipulation.

New exclusive access and never before heard testimony gives a unique insight into the mind of America's most notorious serial killer, Ted Bundy. Breathtaking archive from the time and the voice of Bundy himself, reveals the monster inside the man.

John Meehan created a terrifying trap of seduction, deceit and betrayal for countless victims. The illuminating revelations into his backstory showcase a series of events that flipped switches to create a monster wired for psychopathy. Goffard exposes John’s troubled background that built the foundation for his ominous fantasy world of lies and manipulation. In addition to hearing the Newell family’s terrifying tale, John’s first wife Tonia Bales and her daughters Emily and Abigail Meehan speak out, along with other women from his past who were caught in his web of lies.

This documentary follows superstar Bret Hart during his last year in the WWF. The film documents the tensions that resulted in The Montreal Screwjob, one of the most controversial events in the history of professional wrestling, in which Vince McMahon, Shawn Micheals, and others, legitimately conspired behind the scenes to go against the script and remove Bret Hart as champion.

Serial killer Dennis Nilsen narrates his life and horrific crimes via a series of chilling audiotapes recorded from his jail cell.

Documentary filmmaker Amy Berg investigates the life of 30-year pedophile Father Oliver O'Grady and exposes the corruption inside the Catholic Church that allowed him to abuse countless children. Victims' stories and a disturbing interview with O'Grady offer a view into the troubled mind of the spiritual leader who moved from parish to parish gaining trust ... all the while betraying so many.

Alex Gibney explores the charged issue of pedophilia in the Catholic Church, following a trail from the first known protest against clerical sexual abuse in the United States and all way to the Vatican.

Aileen Wuornos remains a rarity: a female serial killer. From childhood abuse to death-row revelations, this documentary revisits her life and crimes.

A detailing of the rise to prominence and global sporting superstardom of six supremely talented young Manchester United football players (David Beckham, Nicky Butt, Ryan Giggs, Paul Scholes, Phil and Gary Neville). The film covers the period 1992-1999, culminating in Manchester United's European Cup triumph.

A documentary about the life and films of director John Ford.

Go behind the scenes with stars, puppeteers and creators as they bring Jim Henson's magical world of Thra back to life in a sweeping fantasy series.

A road trip across five countries to explore the social and political movements as well as the mainstream media's misperception of South America while interviewing seven of its elected presidents.

A teen slams her car into a building, killing her boyfriend and his friend. What seems like a tragic accident becomes a murder case.

Legendary journalist Gay Talese unmasks a motel owner who spied on his guests for decades. But his bombshell story soon becomes a scandal of its own.

In the mid-aughts, Dateline NBC's To Catch a Predator drew millions of weekly viewers to watch sting operations: men planning to meet minors for sex would instead be confronted by polished host Chris Hansen, then by the police — all on hidden camera.

The line between justice and revenge blurs when a devastated family uses social media to track down the people who killed 24-year-old Crystal Theobald.

Raised by a man leading a monstrous double life, the daughter of the BTK serial killer shares her chilling story.

When Allied forces liberated the Nazi concentration camps in 1944-45, their terrible discoveries were recorded by army and newsreel cameramen, revealing for the first time the full horror of what had happened. Making use of British, Soviet and American footage, the Ministry of Information’s Sidney Bernstein (later founder of Granada Television) aimed to create a documentary that would provide lasting, undeniable evidence of the Nazis’ unspeakable crimes. He commissioned a wealth of British talent, including editor Stewart McAllister, writer and future cabinet minister Richard Crossman – and, as treatment advisor, his friend Alfred Hitchcock. Yet, despite initial support from the British and US Governments, the film was shelved, and only now, 70 years on, has it been restored and completed by Imperial War Museums under its original title "German Concentration Camps Factual Survey".

We look first at Westminster Abbey and the Towers of Parliament. And the sight-seeing only starts there as it continues to all the famous buildings of London.

Documentary looking back at a Britain during the darkest days of WWII using stunning new archived footage and interviews with people who lived through it.

A brief history of British aviation and the development of both civil and military aircraft. Made for the Festival of Britain.

A look at Britain's beloved canal network via a fact-filled cruise along the first superhighways of the Industrial Revolution. In the age before mechanisation, a frenzy of canal-building saw a new army of workers carve out the British landscape, digging out hundreds of miles of waterways using picks, shovels and muscle.

Beautifully made and historically important pipe organs are being scrapped in their hundreds. Once at the centre of British culture pipe organs are now neglected and unloved.

Actual footage by the United States Signal Corps of the landing and attack on Arawe Beach, Cape Glouster, New Britain island in 1943 in the South Pacific theatre of World War Two, and the handicaps of the wild jungle in addition to the Japanese snipers and pill-box emplacements.

Ten-year-old Damilola Taylor was fatally stabbed in 2000 in a stairwell in Peckham, South East London, just metres from his home. 'Star Wars' star John Boyega, who also grew up in Peckham, speaks for the first time about being one of the last people to see him alive, sharing the fear and uncertainty that followed in the aftermath of Taylor's death. Boyega is joined by close friends and family members of Taylor, who reveal the events that led to his death and talk for the first time about the impact his tragic murder has had in shaping their lives.

Hogwood: A Modern Horror Story takes you beyond the factory farm walls and follows an intrepid group of undercover investigators as they enter some of Britain's biggest factory farms for the very first time.

Documentary to mark the WI's centenary. Lucy Worsley goes beyond the stereotypes of jam and Jerusalem to reveal the surprisingly radical side of this Great British institution.

BBC Two takes us inside the world's biggest invention time capsule - the Science Museum vaults - and asks the nation to vote for Britain's Greatest Invention.

After 200 years under lock and key, all the personal papers of one of our most important monarchs are for the first time seeing the light of day. In the first documentary to gain extensive access to the Royal Archives, Robert Hardman sheds fascinating new light on George III, Britain's longest reigning king. George III may be chiefly remembered for his madness, but these private documents reveal a monarch who was a political micromanager and a restless patron of science and the arts, an obsessive traveller who never left southern England yet toured the world in his mind and a man who was driven (sometimes to distraction) by his sense of duty to his family and his country. Featuring Simon Callow and Sian Thomas as the voices of King George and Queen Charlotte.

Marking what would have been Queen Elizabeth II’s 100th year, this landmark documentary tells the story of her life alongside a century of momentous change in Britain. Through archive and eyewitness reflections, the film explores how she led the monarchy through profound social, political and cultural change. Contributions from some of Britain’s best-known faces and international figures, including Dame Helen Mirren, Sir David Attenborough, Barack Obama and Queen Camilla, reveal how she remained a constant in a changing world.

As good as any Dickens novel, this is the triumphant and tragic story of the greatest architectural dynasty of the 19th century. Dan Cruickshank charts the rise of Sir George Gilbert Scott to the very heights of success, the fall of his son George Junior and the rise again of his grandson Giles. It is a story of architects bent on a mission to rebuild Britain. From the Romantic heights of the Midland Hotel at St Pancras station to the modern image of Bankside power station (now Tate Modern), this is the story of a family that shaped the Victorian age and left a giant legacy.

Having been granted special permission to film inside one of the most secretive countries in the world, Britain's fastest snowboarder sets off to experience first hand this country we know so little about.

Augustus Northmore Welby Pugin is far from being a household name, yet he designed the iconic clock tower of Big Ben as well as much of the Palace of Westminster. The 19th-century Gothic revival that Pugin inspired, with its medieval influences and soaring church spires, established an image of Britain which still defines the nation. Richard Taylor charts Pugin's extraordinary life story and discovers how his work continues to influence Britain today.

In 1963 in the countryside in England, fifteen men pulled off 'The Great Train Robbery' netting today's equivalent of $85million. This incredible film features Gordon Goody, one of the instigators of the crime, for the first time ever, revealing the identity of the missing mastermind behind Britain's most famous heist- the elusive and mysterious 'Ulsterman'.

Timeshift turns back the clock to a time when villains wore silver capes, grannies swooned at the sight of bulky men in latex and the most masculine man in the country was called Shirley. In its heyday, British professional wrestling attracted huge TV audiences and made household names of generations of wrestlers from Mick McManus and Jackie 'Mr TV' Pallo to Giant Haystacks and Big Daddy. With contributions from inside the world of wrestling and surprising fans such as artist Peter Blake, this is an affectionate and lively portrait of a lost era of simpler pleasures, both in and out of the ring.

A documentary analyzing the furore which so-called "video nasties" caused in Britain during the 1980s.

Twenty-six-year-old Shani Warren was found drowned in Taplow Lake, Buckinghamshire, with her hands tied and feet bound together in 1987. Revealing how it took a forensic breakthrough to solve the 35-year mystery of the death of The Lady in the Lake.

Shown as part of the BBC's Modern Times series. Think of England shows Parr talking to the many people he encountered in the summer of 1999. He innocently asked people what it took to be English, and this simple question provided many revealing answers.