History's Greatest Mysteries

A union activist disappears from a Detroit suburb. After 45 years, it remains one of the most notorious missing person cases. Jimmy Hoffa's disappearance features more twists and turns than a Hollywood movie, but the question remains: where is he?

In 1959 nine Russian hikers died in mysterious circumstances in the northern Ural Mountains. Numerous theories have been suggested, but just what did make them flee their tent in the middle of the night in sub-zero temperatures?

One of World War II's greatest unsolved mysteries: an incomparable work of art worth half a billion dollars, lost without a trace. Perhaps the single most valuable object the Nazis ever stole. Where is the famed Amber Room?

As the Cold War ramps up, a well-dressed man is found dead within miles of a nuclear testing site on a tranquil Australian beach. It's a case that's obsessed an army of sleuths for over 70 years: Who is the Somerton Beach man, and how did he die?

After a series of dark and ominous events, an unassuming family home on Long Island becomes America's most notorious house. Half a century on, it's spawned a tidal wave of books, documentaries, and films; but do haunted houses really exist?

It's a treasure coveted by everyone from Roman Emperors to Adolf Hitler - a sacred object said to hold incredible powers of healing, resurrection and immortality. It may be the world's most sought-after relic, but what is the Holy Grail?

One of the most chilling aviation mysteries in modern day: a Boeing 777, carrying 239 people, vanishes over the Indian Ocean. Nearly a decade later, the whole world still wonders - what really happened to Malaysia Flight 370?

A cold case that ignites every parent's worst fears: on Christmas morning, 1945, five siblings vanish from their home in West Virginia during a raging fire. The devastated Sodder family spends the rest of their lives trying to find out what happened.

It might be the world's most mysterious book: a medieval manuscript filled with unidentifiable drawings, written in a secret language so complex that even the best codebreakers can't crack it. What is the Voynich Manuscript, and who wrote it?

A spree of gruesome murders shocks Victorian England and the world. The homicidal maniac responsible remains a mystery. Can history's most notorious serial killer ever be identified? Who is Jack the Ripper?

When the infant son of an aviation legend is snatched from his crib at home, it ignites a media firestorm. After a nationwide manhunt, the supposed culprit is brought to justice.

A series of unexplained deaths near Chicago in 1982 starts a nationwide panic. The victims are connected by one frightening detail: cyanide-tainted capsules of Extra Strength Tylenol.