T+E

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.