2 x 2 = 4

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

A drama-documentary presented by Alan Yentob, with Benedict Cumberbatch in the lead role. Every word spoken by the actors in this film is sourced from the letters that Van Gogh sent to his younger brother Theo, and of those around him. What emerges is a complex portrait of a sophisticated, civilised and yet tormented man.

The strange story of John McAfee, who went from millionaire software mogul to yogi, Kurtz-like jungle recluse to potential murderer, and most recently a prospective presidential candidate for the American Libertarian Party.

In this genre-bending tale, Errol Morris explores the mysterious death of a U.S. scientist entangled in a secret Cold War program known as MK-Ultra.

Against the darkening backdrop of New Delhi's apocalyptic air and escalating violence, two brothers devote their lives to protecting one casualty of the turbulent times: the bird known as the black kite.

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.

A documentary about how a dominant cultural and demographic institution both sustains their traditional activities and adapts to the digital revolution.

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.

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 focused on plastic pollution in the world's oceans.