Playback serverIf a title won’t play, switch servers.
Season 1 · Episode 4

0.050mDecember 5, 2017
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.