Comic Title: Blackhawk #221
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: June 1966
On Sale Date: April 7, 1966 Newsstand Date April 7, 1966
Source: Direct Currents, Adventure Comics #344, Page 10

Newsstand Date April 7, 1966
Source: Newsdealer Magazine, V21 #2

Copyright Date April 7, 1966
Source: Library of Congress, Periodicals 1966

Frequency: Monthly
Cover Price: $0.12
Page Count: 32
Editor: George Kashdan

Title: "The Moon Monster"
Pages: 17

Feature(s):
Blackhawk (of Earth-1)

Writer: France E. Herron
Penciller: Dick Dillin
Inker: Charles Cuidera

Feature Character(s)

• Blackhawk (last appearance in Blackhawk #220; next appearance in Blackhawk #221)

Supporting Character(s)

• The Blackhawks (last appearance in Blackhawk #220; next appearance in Blackhawk #221)
• Hendrickson (last appearance in Blackhawk #220; next appearance in Blackhawk #221)
• Stanislaus (last appearance in Blackhawk #220; next appearance in Blackhawk #221)
• Andre (last appearance in Blackhawk #220; next appearance in Blackhawk #221)
• Olaf (last appearance in Blackhawk #220; next appearance in Blackhawk #221)
• Chuck (last appearance in Blackhawk #220; next appearance in Blackhawk #221)
• Chop Chop (last appearance in Blackhawk #220; next appearance in Blackhawk #221)

Villain(s)

• Moonster (Gerald; no further appearances)
• Three crooks (Alfie named; no further appearances)

Other Character(s)

• Naomi (Gerald's fiancee; no further appearances)

Synopsis:
The Blackhawks are sent to the moon to learn what is responsible for sabotaging the space program. They are intercepts by a moon shaped ship piloted by the Moonster, a giant claiming to be from the moon. The Moonster then sends the Blackhawks back to Earth, threatening to continue his efforts to stop the space program.

The Moonster then flies his ship over a city and causes a massive blackout. He warns Earth to discontinue their exploration of the moon. The Blackhawks try in vain to reason with the Moonster, but they meet Naomi, a woman who claims to know the fiend. She explains that the Moonster is a transformed Earth scientist named Gerald who was her fiance.

Meanwhile, three common criminals trick their way aboard the Moonster's ship by claiming to be moon-beings. They use the Moonster in an attempt to steal a gold shipment. The Blackhawks intervene and shoot down Moonster's ship. The crash causes the Moonster to revert to Gerald without any knowledge of his other identity.