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Decades after these segments aired, the producers behind the show are still wondering what happened.
MYSTERY
They've been discovered at Roman-era sites, but no one knows what they're for.
Did Julia Wallace's husband get away with the perfect crime?
The saga of the 1972 skyjacking gets another twist.
Kate Jackson's identity was ever-shifting. But to police and a jury, she was a murder case that has yet to be solved.
Does a mysterious beast really patrol one of Scotland’s deepest lakes? You be the judge.
A forensic anthropologist has recently put a face to a tragedy that has fascinated people for decades.
Spoiler: The answer is not "aliens." It's never aliens.
The books kept coming back with purposeful, curious markings.
In 1836 some boys found a series of little wooden coffins with dolls inside. Was it witchcraft, or a tribute to one of Edinburgh's most gruesome crimes?
Residents of the Canadian border city of Windsor say they're besieged by a persistent noise, but no one can figure out where it's coming from.
Iceland's last execution involved a woman whose crime may never be understood.
The spooky TV ads for Time-Life's encyclopedia of the bizarre inspired the nightmares of countless '80s kids.
The writer was found in great distress and wearing someone else's clothes. A few days later, he was dead.
An early-morning fire erupted in the Sodder household on Christmas Day 1945, and the fate of five children inside has been disputed ever since.
In 1912, 4-year-old Bobby Dunbar went missing in Louisiana. Eight months later, his parents insisted he had been found. But there was something about Bobby that wasn't quite right.