T+E

A brutal double murder shocks Northern California's peace-loving and laid back Marin County; with residents reeling, police chase an elusive killer through three counties and multiple crime scenes to unravel a twisted tale of terror.

Investigate an abandoned village in the shifting sands on Dubai's outskirts and a collection of inexplicable stone circles in Colombia; a mysterious hilltop tower in Iran and a puzzling purple phenomenon in Chile's Atacama Desert.

A man encounters a shadow creature in his bedroom; an unidentified light is spotted above Fairbanks, Alaska; a Detroit brewery is visited by an angelic entity.

Two double murders five years apart take place in Omaha, Neb.; could a doctor connected to the victims, fuelled by rage and revenge, be to blame?

Raised in Northern California, Kenny excelled in football and had big dreams of playing in the NFL, but a misstep in high school triggered a series of events that left him homeless and addicted to dangerous amounts of fentanyl.

Kelly, Tonya and the Alcoa Police Department investigate the 1990 rape and murder of a beloved 80-year-old grandmother and consider if the perpetrator may have been a sadistic random intruder or a member of her own family.

Looking beneath the veneer of money, connections and fast cars that surrounded Tennessee couple Joe and Tina Coronna; learning how secret lovers, shady investments and threats to reveal Joe's financial sins added up to the perfect recipe for murder.

A man encounters a shadow creature in his bedroom; an unidentified light is spotted above Fairbanks, Alaska; a Detroit brewery is visited by an angelic entity.

Investigate an abandoned village in the shifting sands on Dubai's outskirts and a collection of inexplicable stone circles in Colombia; a mysterious hilltop tower in Iran and a puzzling purple phenomenon in Chile's Atacama Desert.

For centuries, legends and eyewitness accounts have told of a massive, hairy creature that roams the forest on two legs.

A Tennessee man may have captured footage of the infamous Dogman creature without realizing it; communicating with extraterrestrials using a laser pointer; a giant structure at the bottom of a lake may be an underwater Stonehenge.

A large black creature emerging from a family's toilet could be some kind of mythical creature; an eerie radio station may secretly be part of a Russian military plan; an astronaut sees something out the window of the International Space Station.

Uncover discoveries that threaten to shatter our understanding of the past; each new discovery confronts our fascination and fear for what is hidden, illuminating the darkest recesses of history.

For centuries, legends and eyewitness accounts have told of a massive, hairy creature that roams the forest on two legs.

A Tennessee man may have captured footage of the infamous Dogman creature without realizing it; communicating with extraterrestrials using a laser pointer; a giant structure at the bottom of a lake may be an underwater Stonehenge.

A large black creature emerging from a family's toilet could be some kind of mythical creature; an eerie radio station may secretly be part of a Russian military plan; an astronaut sees something out the window of the International Space Station.