Beneath Yellowstone National Park, lies the biggest volcano on Earth. An eruption in the past was so big it plunged the earth into a volcanic winter that lasted years. A super-eruption would be more than millions of Hiroshima bombs going off all at once. It would be even worse than an asteroid impact: Entire cities lost beneath ash, people and animals crushed alive, power networks destroyed, sun dimmed across the globe, harvests failed, widespread famine. Could this nightmare really happen? We will use the latest scientific data to uncover the danger beneath us, as we see our planet like never before.

The series follows the tragedy that occurred when terrorists attacked at the annual Boston Marathon on April 15, 2013. They carried out the attack by placing two homemade pressure cooker bombs which detonated near the finish line of the race 14 seconds and 210 yards (190 m) apart. That resulted in three fatalities and hundreds injured, including 17 who lost limbs. With the help of archive footage, interviews with investigators, witnesses, survivors, and occasional reenactments, it offers details about the FBI investigation into what was quickly deemed a domestic terrorist attack.
In the first episode, hours after the blasts, investigators pore over evidence. One photo and a few seconds of footage lead to a breakthrough - and an agonizing choice.

The once-quiet suburbs of Sweden's major cities are the epicenter of a vicious turf war between rival gangs competing for the drug trade. The fierce competition has resulted in a series of tit-for-tat killings with almost daily shootings and bombings. More than 45 people have been shot dead so far this year. Paraic O'Brien steps onto the frontline of Sweden's deadly gang war, as the country becomes one of the most lethal for gun crime in the whole of Europe.
From the front line of its lethal drug wars, a look at how Sweden has become one of Europe's deadliest hot spots for gun crime, with shootings often committed by children.

The 1980s was an era in which a fusillade of new genres emerged, and many are still with us today, such as hip-hop and house. Dylan Jones has mined the archives to select some of the most crucial tracks in the rise of these two genres.
From a young Kurtis Blow making his Top of the Pops debut to the sonic bombardment of Public Enemy and the sampling skills of Bomb the Bass, this episode showcases the evolution in rap and house music across the decade. There are rare archival interviews and stellar performances from Run-DMC, Salt 'N' Pepa, S'Express, Cookie Crew and Neneh Cherry, as well as iconic videos from Herbie Hancock, The Beastie Boys, M/A/R/R/S, Grandmaster Flash and the Furious Five, and many more.

The film recounts the story of the 100th Bomb Group during World War II and follows bomber crews on dangerous missions to destroy targets inside German-occupied Europe. The Documentary honors the heroes of the Group and portrays the intensity of war, the dangers that the airmen face, and the friendships and relationships that develop. This unit from the Eighth Air Force B-17 Flying Fortress suffered tremendous losses in combat, with 177 aircraft missing in action, flying its last mission on 20 April 1945.
Meet the airmen who inspired the tv series 'Masters of the Air' as they share the harrowing and transformative events of the 100th Bomb Group. The interviews with the real-life heroes are revealing, and the wealth of newsreel footage compiled in the documentary is utilized with a sharp eye for detail.

The images of brothers Tamerlan and Dzhokhar Tsarnaev are released to the public setting off a violent chain of events. Meanwhile, clues from their past tell a complicated story - how was the radicalization of the ethnically Chechen brothers and the existence of potential collaborators. The post-9/11 biases played a role in the investigation.