Frank Springer's first Marvel work. Springer had previously done SECRET SIX #1-2 (May-July 1968) for DC and "PHOEBE ZEIT-GEIST" in the magazine EVERGREEN REVIEW. Expanded retelling of the story from STRANGE TALES #135 (August 1965), following the retold origins in IRON MAN #1, CAPTAIN AMERICA #100, THE INCREDIBLE HULK #102, SUB-MARINER #1 and DR. STRANGE #169. Roy Thomas mistakenly refers to the leader as "Supreme Hydra", when in most episodes of the original serial he was referred to as "Imperial Hydra" (hinting at his connection with Imperial Industries International).
Letters from Edward Romero, Donald F. McGregor (future comics writer), Steve Shuchart, Steven Grant (future comics writer), Mike Richmond, and Ralph Duby; includes Know Ye These, the Hallowed Ranks of Marveldom.