And the Welcome back, friend.

Across 1968 and through 1969, there had already been three vicious and violent attacks on young couples in the San Francisco Bay area.

Four victims had lost their lives to a man known only as the Zodiac. This killer had gone from shooting his victims under the cover of darkness

to stabbing them, ferociously up close and personal. A flip imm modus operandi that startled and baffled the detectives, hunting

this man down. The Zodiac was skilled in finding young couples alone and in spots that were quiet and isolated

their location nullifying to an extent the fact he went after two victims at the same time, a much riskier strategy than going

after just one.

He was an individual who appeared to enjoy taking such risks, yet planned and prepared to ensure he always remained in control.

Across three crime scenes, Lake Herman Road, Blue Rock Springs, and Lake Barriessa,

the Zodiac had attacked an axe of surprise and violence. Two victims had survived his brutality, but with his face

always hidden, the identity of this man remained elusive and out of reach.

The Zodiac Killer was a mystery that deepened with each new sickening attack.

He was a dangerous and unpredictable human being who thrived on the chaos he created and wasn't finished

yet.

In his violent movements, or rather the violent periods that he has been in.

He is an absolutely ruthless, completely merciless killer.

He calmly goes about his business of,

he doesn't get great excitement over,

he just thinks killing is just killing, so somebody like that is going to be a very serious problem for us.

On the evening of October the 11th, 1969, exactly 14 days after the attack at late Bereessa, three

teenage siblings were settling down for the night at their home in San Francisco. They lived in Procedio Heights, a quiet,

wealthy and respectable neighborhood that wasn't usually the scene of violence and bloodshed.

...