We're all fascinated by that eerie feeling that goes along with tales of unexplained sightings and people who vanish without a trace. Here are some of "Unsolved Mysteries'" most enduring puzzles.

This episode highlights five real-life cases featured on Unsolved Mysteries that were solved thanks to viewer tips—ranging ...

An undeniably interesting case with a boilerplate documentary treatment, My 'Brother's Killer' differentiates little from ...

FBI files reveal Maine pilot Raymond Russell was investigated as possible D.B. Cooper suspect in the famous 1971 hijacking ...

The magnum opus of particle physics is far from complete, requiring physicists to devise many alternatives—some weirder than ...

A 55-year-old man developed painful swelling that doctors later thought was arthritis. Subtle clues revealed something more ...

Author Michael Connelly and former LAPD detective Rick Jackson will discuss their contested theory linking the Zodiac ...

In the 2007 film “Zodiac,” Jake Gyllenhaal, as political cartoonist-turned crusading sleuth Robert Graysmith, lays out the chain of facts and coincidences that lead him to believe he’s discovered the ...

For years, Michelle Thomas has tracked her calls to law enforcement for updates on her son’s murder case. “No answer” is scrawled next to many of the entries in her handwritten log. Her son, Carl ...