For decades some have suspected that there might be others out there, intelligent beings capable of communicating with us, even visiting our world. It might sound like science fiction, but today scientists from across the globe are scouring the universe for signals from extraterrestrials. Horizon obtained exclusive access to film researchers at the Green Bank Telescope searching for radio signals from Tabby's Star, a star so mysterious that some scientists believe it might be surrounded by a Dyson Sphere, a vast energy collector built by advanced aliens.

When the rumoured whereabouts of Osama bin Laden are revealed, the CIA readies a team of seasoned U.S. Navy Seals for the mission of a lifetime. Despite inconclusive evidence that bin Laden is inside the compound, and ignoring the possible ramifications of an unannounced attack on Pakistani soil, the Pentagon orders the attack. The Seal Team bands together to complete their mission of justice in a riveting final showdown.

A documentary feature on the explosive narco culture, a phenomenon blurring the lines between war and entertainment. To a growing number of Mexicans and Latinos in the Americas, the Narco Traffickers represent the only models of fame and success, the only way out of the ghetto. This is the untold story behind the drug war, an unstoppable cycle that has created a culture of addiction on both sides of the border — addiction to the vanity of money, drugs and violence. These are the personal stories of those entangled in this war, from the musicians who profit by glorifying violence, to the man who collects the bodies the morning after.

Thought-provoking documentary on war propaganda: how governments manipulate the facts and how most media let them get away with it. WWI, Vietnam War, post-2001 Afghanistan, post-2003 Iraq, Palestine: a historical account of PR, embedded journalism, lies and cover-ups, but also of courageous journalists who disclose the truth.

An intimate portrait of Malala Yousafzai, who was wounded when Taliban gunmen opened fire on her and her friends' school bus in Pakistan's Swat Valley. The then 15-year-old teenager, who had been targeted for speaking out on behalf of girls' education in her region of Swat Valley in Pakistan, was shot in the head, sparking international media outrage. An educational activist in Pakistan, Yousafzai has since emerged as a leading campaigner for the rights of children worldwide and in December 2014, became the youngest-ever Nobel Peace Prize Laureate.

Sir David Attenborough returns to the Galápagos Islands and travels throughout the archipelago to explain their origins and their unique fauna in evolutionary terms. He has captured a new species of pink iguana on film for the first time. In the first episode, the islands of the Galapagos rose explosively from the ocean four million years ago. Although life would not seem viable in such a remote Pacific outpost, the first arrivals landed as the fires still burned. David Attenborough explores the islands for the animals and plants that descend from these pioneers: from the sea birds carrying the seeds that made a tentative foothold on these rocks, to equator-dwelling penguins and a dancing bird with blue feet. This is a story of treacherous journeys, life-forms that forged unlikely companionships, and surviving against all odds. It is the story of an evolutionary melting pot in which anything and everything is possible.