250 million years ago, life on this planet flourished. The can the mysterious Permean mass extinction and the disappearance of 95% of all species.

Comets have fascinated, even terrified us for thousands of years. This year, a particularly massive chunk of ice and rock is hurtling our way, an object that will fascinate billions and should create the space show of the century.

British intelligence undertook an audacious operation to listen in on the private conversations of 10,000 German prisoners of war without their ever knowing they were being overheard. The prisoners' unguarded reminiscences and unintentional confessions have only just come to light, and prove how closely the German army were involved in the atrocities of the Holocaust. British intelligence requisitioned three stately homes for this epic task, and converted each into an elaborate trap. The 100,000 hours of conversation they captured provided crucial intelligence that changed the course of the war, and revealed some of its worst horrors, from rape to mass executions to one of the earliest bulletins from the concentration camps. But when the fighting ended, the recordings were destroyed and the transcripts locked away for half a century. Only now have they been declassified, researched and cross-referenced.

A private security contractor in Iraq rejects the official explanation of his friend's death and decides to investigate.

Ingrid Betancourt was the world’s most famous hostage. On February 23rd 2002, Ingrid, a presidential candidate in Columbia’s elections, was kidnapped by the left-wing FARC rebel group along with her assistant and friend Clara Rojas. She was held for over six years in the jungle. This is the first documentary account of what happened in the jungle in her words and those of fellow hostages. In a truly remarkable interview Ingrid relives stories of escape and betrayal, love and hate, terror and extraodinary courage.

Above Suspicion is a British TV series based on Lynda La Plante's novels Above Suspicion, The Red Dahlia, Deadly Intent and Silent Scream. It stars Kelly Reilly and Ciarán Hinds, and features the career of La Plante's latest heroine DC Anna Travis. The first series, Above Suspicion, was shown on the fourth and fifth of January 2009; the second series, Above Suspicion: The Red Dahlia, was shown on the fourth, fifth and sixth of January 2010. The third series, Above Suspicion: Deadly Intent, was shown on the third, fourth and fifth of January 2011. The fourth series, Above Suspicion – Silent Scream was shown on the ninth, sixteenth and twenty-third of January 2012; in a break from the previous broadcasts, which were broadcast on consecutive days, this latest tale was serialised weekly. ITV cancelled Above Suspicion on May 28, 2012.

Documentary about comets. Many ancient civilisations believed comets were gods. Now, space missions can show what comets are really made of and where they come from.

On December 4, 1872, the unmanned Mary Celeste was found adrift in the Atlantic with its cargo fully intact. The mystery of this "ghost ship" remained unanswered for over 135 years. What happened to the Mary Celeste is widely regarded as the most famous mystery of the sea. Watch it unfold to its stunning conclusion, at last.

Reporters Mariusz Pilis and Marcin Mamon travel to neighboring Chechnya, one of the most dangerous places on earth, to report on what life is like after more than a decade of Chechen terrorism and Russian repression. Filmed over the course of nine months, the film reveals that what started as a separatist movement in 1994 has now become synonymous with terrorism.

Amidst the pristine but freezing waters surrounding the white continent, a unique insight into the mysterious daily lives of Leopard Seals and discover some never-before-filmed behaviors of these highly intelligent predators. "Killer Seals" will reveal how Leopard Seals hunt penguins underwater or on land, charging unwary trespassers on the ice, be they penguin or human!

The series is mainly focused on social issues and current affairs stories around the world. International current affairs documentaries, replacing "Correspondent".

This docu-miniseries explores siege warfare and explains how those that are vastly outnumbered have stood behind walls and barricades in a last stand against their attackers.

Journey through the long-vanished corners of prehistoric North America, beginning when man first entered the vast, unspoiled continent some 14,000 years ago, in this appealing BBC documentary. Witness ancient beasts, mammoths, mastodons, giant bears, and sabre-toothed cats, and see the legacies each has passed to their modern successors. Computer animation and digital effects bring to life mammoths, saber-toothed cats, giant ground sloths, short-faced bears, glyptodonts, and a plethora of smaller animals in a lush Ice Age mosaic. Discoveries from sites across America are the basis for the reconstructions. The BBC team behind "Blue Planet" and "Walking with Dinosaurs" now takes you back to an 'early America' beyond imagination. Travel back 14,000 years as humans were first entering the continent, sharing it with ancient beasts.

This series shows the workings of an English hospital through the eyes of its junior doctors. Naive and idealistic Dr Andrew Collins (Andrew Lancel), soon realises he still has much to learn. His boss, Dr Claire Maitland (Helen Baxendale) on the other hand, has seen it all. She is a competent doctor, with a cynical view, and is ready to work the system when needed, but she and Collins work well together as she guides him through the many minefields of working in the NHS.

Francis Urquhart's survival at the top is threatened by the new king's populist agenda.

In this fondly remembered mini series John Byrne, creator of Tutti Frutti, explores the country music scene in an unsentimental portrait of Glaswegian life and culture. Local food and wine correspondent Frank McClusky falls in love with waitress Cissie Crouch. Unfortunately for him, she’s the wife of a convict, who is serving time for a crime he didn’t commit. As Frank’s life becomes more embroiled with Cissie’s he goes on a mission to track down the guilty men.

When he was a little boy, Dillon's rock musician father and hippie mother died in a traffic accident. Now in his twenties, Dillon wants nothing more than a normal, responsible life, working in an office and taking care of the grandmother who raised him. But his grandmother has other ideas, and Dillon finds himself lured into an alternate lifestyle of art, pleasure and rebellion.

The film centers on the experiences of Robert Lawrence MC, an officer of the Scots Guards during the Falklands War of 1982. While fighting at the Battle of Mount Tumbledown, Lawrence is shot in the head by an Argentine sniper and left paralyzed on his left side. He then must learn to adjust to his new disability.

Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.