The Secret FBI Files The Hunt for the Zodiac Killer : Season 1 Episode 4
TV-14 (TV rating) History 42m int(0)
Aired: December 5th, 2017 @ 10:00 PM EST on History
The hunt goes into high gear as the FBI releases secret files on the killer; a handwriting analyst connects the Zodiac's letters to a taunting letter mailed 3,000 miles away in Albany, N.Y.; the code team has a massive breakthrough on the Z-340.