

It's 1982 and 7 people including a child are dead after taking Tylenol laced with cyanide. A paramedic and a nurse rush to piece together the truth.

Suspects emerge. A chilling letter and a leaked surveillance photo of a mystery man offer new clues. Could he be the person who poisoned the pills?

As police ramp up their manhunt for prime suspect James Lewis, the makers of Tylenol execute a multimillion-dollar PR campaign to save the brand.