California was thrown into a paralysis of fear in 1969, distraught over the unsolved murders of the Zodiac killer. The Zodiac became the most elusive and frustrating adversary ever encountered by the law enforcement community. A series of letters, allegedly written by the murderer himself and published in local newspapers, only added to the mystery and panic.

The Zodiac serial killer remains an enigma that is unparalleled in the history of crime in America, and the case still remains unsolved.

This documentary explores one of the great unsolved murder mysteries of all time, taking second place to only the legendary British Victorian slasher Jack the Ripper.

This is the Zodiac Speaking examines the crimes of The Zodiac a little bit closer, and tries to make the case as to who he may have been and what motivated him to kill.