Richard Ramirez - The Night Stalker's Summer of Terror, 1985

BTK Killer - He Installed Security Alarms for His Own Victims

JonBenét Ramsey - The Note, the Body, and Thirty Years of Silence

Jack the Ripper - The Murders That London Could Not Solve

The Oakville Blobs - A Gelatinous Rain Washington Can't Explain

Elisa Lam - Found in the Cecil Hotel Water Tank After 19 Days

Ted Bundy - The Lies That Built America's Most Infamous Killer

Jonestown Massacre - Largest Loss of American Life Before 9/11

Voynich Manuscript - The Unbroken Code That Defeated the NSA

Taos Hum - The Unexplained Low Frequency Sound of New Mexico

Alcatraz Escape 1962 - Three Men Vanished Into the Bay

Amelia Earhart - Last Known Position 157-337, Then Nothing

Zodiac Killer - Taunted Police for Decades, Never Identified

The Black Dahlia - Elizabeth Short's Unsolved Murder, 1947

Dyatlov Pass - Nine Dead, a Tent Cut From Inside, No Answers

D.B. Cooper: Ransom, a Parachute, and Fifty Years of Nothing