The Intel Lab: Unsolved

On December 1, 1948, a well-dressed man was found dead on Somerton Beach, Adelaide, South Australia - an electrical engineer later identified as Carl Webb. Every label had been removed from his clothing, and no identification was found on his body. Weeks later, investigators discovered a torn scrap of paper reading "Tamám Shud" ("it is ended" in Persian) sewn into a hidden pocket in his trousers, traced to a rare edition of the Rubáiyát of Omar Khayyám. The book contained a handwritten code that has never been definitively broken. For decades the case fueled theories ranging from Cold War espionage to poisoning to a broken heart.