In the wake of the shooting of five Dallas police officers, BBC Three investigates why tension is rising between America's police forces and ethnic minorities. Shot on the streets of New York, the film follows 'Cop Watchers' - men and women who track the NYPD in a cat-and-mouse game to try and film arrests and possible cases of brutality. NYPD officers also speak out, alleging systemic racism and a policy of targeting ethnic minority communities in order hit their arrest quotas.

The Glock pistol has been fetishized in films and the arts, and is a regular top seller in the international arms market. This documentary tells the story of the rise of the Glock: the most sought-after service and murder weapon worldwide.

[HBO] HD. A companion to HBO Films' "O.G.," this documentary is co-directed by 13 incarcerated men who reflect on their lives.

In her own words, comedienne Gilda Radner looks back and reflects on her life and career. Weaving together recently discovered audiotapes, interviews with her friends, rare home movies and diaries read by modern day comediennes (including Amy Poehler), LOVE Gilda offers a unique window into the honest and whimsical world of a beloved performer whose greatest role was sharing her story.

Comedian Bill Burr takes the stage in Nashville and riffs on such topics as overpopulation, fast food, dictators and gorilla sign language.

This feature-length documentary tells the untold story of how David Robert Jones became David Bowie, how Bowie became Ziggy Stardust and how Ziggy became immortal - changing the musical landscape as he did so. David Bowie: Finding Fame is the story that finally makes sense of one of the greatest icons of the 20th and 21st centuries.

Iceland, 1976. Six suspects confess to two violent murders. Their involvement was all in their heads. This is the strangest criminal investigation you've never heard of.

Shot around the world in 2010 and 2011 and narrated by Ewan McGregor, 'Fastest' captures the intense and thrilling reality of the MotoGP World Championship, documenting a pivotal moment in the sport. With Valentino Rossi chasing his tenth World Championship title the Italian ran into one of the toughest challenges of his career: a crop of exceptionally fast young competitors, a horrific leg break at his home race, and an amazing comeback little over 40 days later. Confronting such a monumental task and with rival Jorge Lorenzo taking the 2010 title, Rossi faced up to one of the most testing years in his illustrious career and along with his fellow competitors was left asking: Who is the fastest rider now?

In a rural village outside Delhi, India, women lead a quiet revolution. They fight against the deeply rooted stigma of menstruation. "Period. End of Sentence." -- a documentary short directed by Rayka Zehtabchi -- tells their story. For generations, these women didn't have access to pads, which lead to health problems and girls missing school or dropping out entirely. But when a sanitary pad machine is installed in the village, the women learn to manufacture and market their own pads, empowering the women of their community. They name their brand "FLY," because they want women "to soar." Their flight is, in part, enabled by the work of high school girls half a world away, in California, who raised the initial money for the machine and began a non-profit called "The Pad Project."

Flat Earthers, a term synonymous with conspiracy theorists who wear tinfoil hats. Meet real Flat Earthers, a small but growing contingent of people who firmly believe in a conspiracy to suppress the truth that the Earth is flat. One of the most prominent Flat Earthers is Mark Sargent who, in the midst of the upcoming Solar Eclipse, proudly speaks at the first Flat Earther conference.

THE RETURN is a 2016 documentary directed by Emmy Award winning director Erich Joiner chronicling Ford GT's return to 24 Hours of Le Mans after their 1966 1-2-3 victory.

A chronicle of the wild and brief life of the 1970s' most controversial surf star and international playboy from Los Angeles, Bunker Spreckels.

Pope Francis travels the world speaking to those in need and delivering a message of hope.

During World War II, a hand-picked group of American GI's undertook a bizarre mission: create a traveling road show of deception on the battlefields of Europe, with the German Army as their audience. The 23rd Headquarters Special Troops used inflatable rubber tanks, sound trucks, and dazzling performance art to bluff the enemy again and again, often right along the front lines. Many of the men picked to carry out these dangerous deception missions were artists. Some went on to become famous, including fashion designer Bill Blass. In their spare time, they painted and sketched their way across Europe, creating a unique and moving visual record of their war. Their secret mission was kept hushed up for nearly 50 years after the war's end.

Montauk, East Hampton, New York, 2016. Peter Beard discusses his work as a photographer, artist and diarist before reminiscing about his attempt to make a documentary in the summer of 1972 with his friend Lee Radziwill (younger sister of Jacqueline Kennedy Onassis), focusing on their childhood and the 20th- century history of East Hampton.

Parallel universes sound like a myth, but a surprising number of leading scientists believe they are real. National Geographic delves into the mysterious science of other universes.

Scientists and engineers who built the world's largest solar telescope and launched the first solar probe into space help predict and prepare the planet for solar storms.

An investigation into the circumstances and controversy surrounding Sam Cooke's murder.

With unprecedented access to pivotal artists and the white-hot market surrounding them, this film dives deep into the contemporary art world, holding a fun-house mirror up to our values and our times -- where everything can be bought and sold.

Documentary filmmaker Jon Greenhalgh examines the life of Dave Schultz, a professional wrestler who was part of 'Team Foxcatcher', funded by multi-millionaire John du Pont.