Expedition Files, Madness Explained

What really happened to union boss Jimmy Hoffa? Could modern technology finally prove the existence of the Holy Grail? And did inventor Rudolf Diesel really die at sea, or did he stage his own disappearance?

Was witchcraft at work during the Salem Witch Trials, or an undiagnosed psychological illness? Did Britain's famous UFO sighting by military officials have a more earthly explanation? Who's really responsible for the murder of the "Mad Monk" of Russia?

A mysterious body is found on a beach with only a cryptic note. The Trojan War & the Trojan Horse were once thought to be pure myth, but the discovery of ruins reveals they were all too real. New evidence may prove Shakespeare didn't write his own works.

Josh Gates hunts down the world's most elusive treasures. What really became of Konigsberg Castle's Amber Room, stolen by the Nazis? Could a lost hard drive in a British landfill hold millions in Bitcoin? Did King Solomon's legendary mines ever exist?

High on Everest's icy slopes, two climbers vanish into legend. In a quiet West Virginia town, a ghost demands justice from beyond the grave. And learn the real story of Mata Hari -- the exotic dancer condemned as a German spy.

A real-life child whose possession inspired 'The Exorcist'; a master con artist who left a trail of deception (and perhaps even murder); and an ancient army defeated by hallucinogenic honey -- these three stories prove that truth can outmatch fiction.

Did MKUltra's mind-control experiments spiral beyond the agency's grasp? Was Cleopatra's death truly by her own hand, or a political assassination disguised as legend? Where did a painting worth $160 million disappear to without a trace?

Was the Hindenburg truly destroyed by accident or by sabotage? Could the famous Patterson-Gimlin Bigfoot footage hold clues that only modern analysis can define? What really happened when 50,000 Persian soldiers disappeared without a trace in 524 B.C.?