For 51 years, one of the most analysed unsolved ciphers in American criminal history resisted decryption. The 340-character message — sent by the Zodiac Killer to the San Francisco Chronicle in November 1969 — was finally solved in December 2020 by a three-person international team. Using publicly available reporting, the team's own documentation, or the dedicated cipher research community at zodiackillerciphers.com, identify the full names of all three members of the team that cracked the Z340 cipher and the countries they were each based in at the time of the solution.