Josh Gates is in Africa's Kalahari Desert seeking a fabled lost city. He encounters wild animals, rafts down rapids and flies in an open-air helicopter.

Resurrections in Haiti lead to rumours of zombies. Plus, transplant patients complain of side effects, possibly passed on from their donors.

Throughout the American civil war, victory on the battlefield was often decided not by strategy and bravery alone, but also by secret information coming from the shadows.

Chasing a two-billion-dollar fortune, a landslide and the infamous "Death Road" put the team in danger as they try to cross South America's Andes Mountains.

The team find a clue that leads them to consult with a local who is knowledgeable of the area. With his help, they find the entrance to a secret underground tunnel system.

Treasure hunters search for clues to a vast fortune they believe is hidden on Brazil's "Snake Island." But team tensions could derail the expedition.

Test pilot Gordon Cooper is preparing to test a radical new landing system in a lakebed when two UFO's appear. Also, the mystery of Saturn's mega-hex.

A UFO crashes in Pennsylvania. Was it a secret Soviet satellite, or something far more dangerous? On Mercury, NASA finds the impossible: frozen water.

Christof jumps from a plane and digs up rare FBI files as he follows new leads in his quest to find the real identity of hijacker D.B. Cooper.

Christof investigates the Lindbergh kidnapping, a story that made his grandfather's journalism career. Christof tracks down surprising new links to Germany.

Christof investigates the robbery of the Isabella Stewart Gardner Museum, the largest art heist in history. Was there a connection to organized crime?

Christof tries to unmask the Axeman of New Orleans, a crazed murderer responsible for one of the deadliest unsolved killing sprees in American history.

Investigative journalist Christof Putzel chases a Black Dahlia suspect to the Philippines and discovers another shocking murder.

Christof joins the decades-long hunt for the buried millions of gangster Dutch Schultz. He tracks the Prohibition-era mob boss in search of his haul.

The mummies of three Incan children are discovered in the Andes at a notorious UFO hotspot. Ramy examines why they trekked 1,000 miles to their death.

A mysterious invoice written by Harriet Tubman prompts Justin to investigate the impact a secret network of escaped slaves made on the Civil War.

Don Widman investigates a woman who claimed she gave birth to rabbits. Plus, he explores the curious case of a young girl with magnetic superpowers.

Experts examine whether an interdimensional portal in the Alaska Triangle led to the disappearance of an aeroplane carrying 44 military personnel in 1950.

A team of expert paranormal investigators are called by the Morgan City, Louissiana, police department to the site of a mysterious shapeshifting mist near the town's lake.

Jack and Katrina head to Ohio to explore a jail said to house dozens of spirits. The duo has their work cut out for them as they separate rumour from truth.

A team of expert paranormal investigators are called by the Morgan City, Louissiana, police department to the site of a mysterious shapeshifting mist near the town's lake.

A threatening presence brings the constructions on the Beattie Mansion to a halt. Nick and Katrina use cutting edge experiments to lure out the ominous spirits.

A campus policeman is lured into a building by the vengeful ghost of a murdered student, and an officer encounters a deceitful spirit inside a courthouse.

An unknown entity torments a teenager who is afraid to live in his own home. Could the activity be linked to the tragic death of the grandfather, who was buried alive?