About this season
Who really laced Tylenol with cyanide? This true-crime series examines alarming theories behind the unsolved killings — and tracks down a key suspect.
Episodes (3)
E1
1. Pain Killer
7.8Aired 26 May 2025 • 43 min
After cyanide-laced Tylenol kills multiple people across Chicago, police and the media scramble to spread a nationwide warning.
E2
2. The Bitter Pill
7.8Aired 26 May 2025 • 39 min
A key suspect maintains his innocence, even as authorities discover his suspicious past and possible motive. Tylenol unveils new triple-seal packaging.
E3
3. Sealed for Your Protection
7.2Aired 26 May 2025 • 37 min
Decades after the murders, a victim's daughter searches for justice — and uncovers forgotten evidence that supports a controversial theory.