← The Hunt for the Zodiac Killer · Season 1

The Secret FBI Files

S1 · E4 · 05 Dec 2017 · 50 min

The hunt goes into high-gear as the FBI releases secret files on the mysterious Zodiac Killer, and a handwriting analyst connects the Zodiac’s letters to a taunting letter mailed 3,000 miles away in Albany, NY. The code team has a massive breakthrough on the Z-340.