Deep in the mountains of West Virginia, the Green Bank Observatory has been receiving a mysterious signal from deep space. Could this be a message from an advanced civilization, or is it a much stranger and violent occurrence? Visit the largest steerable radio telescope on the planet for answers.

Worldwide, depression afflicts more than 300 million people, making it the leading global cause of disability. Suicide is the 2nd leading cause of death in the world for those aged 15-24 years. Now, there may be a new tool in fighting that depression in the 50-year-old anesthetic ketamine.

Is it possible that there is a hidden planet within our own solar system? New evidence suggests that the fabled Planet X, or Planet 9, may indeed exist… but where? Meet the teams racing to discover and redefine our planetary neighborhood.

Archaeologists and geneticists are uncovering surprising details about one of the most mysterious civilizations in Pre-Incan South America. While many are familiar with the Incas…few have heard of the Chachapoya, the people known as the Cloud Warriors, a mysterious pre-Incan Peruvian culture.

Joaquin Archivaldo Guzman Loera. You know him as El Chapo – a ruthless drug lord who became famous for using slick maneuvers to evade capture. But Chapo is not only a dark and devious character. He is also a wildly successful billionaire entrepreneur with business acumen.

History is littered with criminals, con artists, frauds, and fakes. We look at the most interesting from Adam Worth, the 19th-century inspiration for Professor Moriarty, to a jewel thief named ‘Diamond’ Doris and a ‘Count’ who sold the Eiffel Tower to gullible buyers… twice.

Pirates! Hollywood has fueled our imaginations and turned them into popular icons. Beyond literature and fantasy, the documentary reveals who these fearless adventurers and these masters of the sea once were.

For decades after the end of World War II, rumors persisted that the mountains of southwest Poland held a precious secret - a mysterious train laden with tons of gold, rare jewels and priceless art hidden by the Nazis in a secret labyrinth of tunnels.

This is the definitive documentary of Europe’s most sensational murder case. For the first time ever the whole story of the Murder of Meredith Kercher and the subsequent incrimination of Amanda Knox, Raffaele Sollecito, and Rudy Guede can be told.

Druids, the mysterious wizards of the Celts, have always fascinated the world. They are an integral part of ancient literature, as heroes of Irish legends and stars of modern fantasy worlds. But who were they really?

What makes a person become a serial killer? Follow forensic scientists, law enforcement, profilers, and prosecutors on the trail of German female serial killer, Tuba S. She was accused of murdering the magician Riconelly in 2016, but it seems that he was not her first victim…

Amelia Dyer was perhaps the most prolific killer in British history. She earned a living through murder. And her victims were babies.

It’s been two decades since a serial killer's reign of terror hit Cape Town's sex workers. During the period 1992 -1996, twenty-six workers were killed and their bodies dumped all over the peninsula.

The last time Hannetjie Stadler heard her daughter's voice was a voicemail, as she called for help during a brutal, murderous attack. In 2005, the popular tourist town of Knysna was shattered when two young women were murdered in a nightclub over a period of two months.

This is the story of one of the worst ever killing sprees in South Africa. Several bodies have been discovered within a small area. There seem to be similarities between victims - couples out at night have been kidnapped, raped, and then shot.

This fly-on-the-wall documentary follows the story of three extraordinary men who fight crime using extremely unorthodox methods. Their remarkably fascinating use of nothing more than their inventive minds leads to the creation of the ultimate crime-fighting team.

Inside the Mind of a Con Artist unearths the human truths behind some of the most extraordinary cases in con artistry.

Modern science reveals the environmental forces that have shaped human history

Just how much ‘science’ is in ‘forensic science’? It’s time to put crime scene investigation methods on trial.

Cracking the Code reveals the greatest codes known to humanity and the brilliant minds that crack them…

Throughout history some of the world's most amazing works of art have disappeared, this series attempts to uncover them.

Throughout history some of the world's most amazing works of art have disappeared, this series attempts to uncover them.

This drama-doc series takes you back in time to the most shocking and surprising murder cases in history.

This drama-doc series takes you back in time to the most shocking and surprising murder cases in history.

This drama-doc series takes you back in time to the most shocking and surprising murder cases in history.

Myths and Monsters takes its audience on a journey through the mythic landscape of Europe, revealing the origins of the most famous legends

The new three-part series Forensics –The Science of Crime takes a closer look behind the scenes of spectacular criminal hunts.

This groundbreaking documentary series shows what it's like to serve a long-term prison sentence in Britain.

Cases of wrongful conviction plague the justice system, leading to many decades – and even lives – lost behind bars.