The BEST seasons of Cold Case: The Tylenol Murders

Every season of Cold Case: The Tylenol Murders ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of Cold Case: The Tylenol Murders!

Who really laced Tylenol with cyanide? This true-crime series examines alarming theories behind the unsolved killings — and tracks down a key suspect.