All Seasons

Season 1

  • S01E01 The New Suspect

    • November 14, 2017
    • History

    A new hunt for the mysterious Zodiac Killer gains unprecedented access to files, unearthing a complicated cypher that may contain the killer’s name, and links between the Zodiac Killer and an unsolved case. A prime suspect with code training emerges.

  • S01E02 The Military Connection

    • November 21, 2017
    • History

    The team uncovers clues that the killer may have served in the U.S. Armed Forces, as the supercomputer identifies symbols in the code that would have been known to only a few when it was written; Sal and Ken find new evidence.

  • S01E03 A New Code Uncovered

    • November 28, 2017
    • History

    The team uncovers a mysterious new cipher related to the Zodiac Killer, while the supercomputer uncovers a strange lunar pattern linking the killings; a taunting riddle by the killer may lead to a body; a second prime suspect emerges.

  • S01E04 The Secret FBI Files

    • December 5, 2017
    • 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.

  • SPECIAL 0x1 Enhanced Edition

    • December 10, 2017
    • History

    Episodes 1 thru 4 enhanced with new never before seen bonus footage

  • S01E05 The Code Is Cracked

    • December 12, 2017
    • History

    Sal and Ken investigate San Francisco, the epicenter of the Zodiac Killer murders; the Code Team announces a team member has solved the Zodiac's infamous Z340 code, which has eluded codebreakers for 50 years.