Comic Title: Blackhawk #139
Publisher: DC (National Comics Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: August 1959
On Sale Date: June 11, 1959 Copyright Date June 11, 1959
Source: Library of Congress, Periodicals 1959

Newsstand Date June 11, 1959
Source: Newsdealer Magazine, V14 #4

Frequency: Monthly
Cover Price: $0.10
Page Count: 32
Editor: Jack Schiff

Title: "Killer Shark's Underseas Armada"
Pages: 8

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

Penciller: Dick Dillin
Inker: Charles Cuidera

Reprinted In:
Blackhawk #210 (1965)

Feature Character(s)

• Blackhawk (last appearance in Blackhawk #139; next appearance in Blackhawk #140)

Supporting Character(s)

• The Blackhawks (last appearance in Blackhawk #139; next appearance in Blackhawk #140)
• Hendrickson (last appearance in Blackhawk #139; next appearance in Blackhawk #140)
• Stanislaus (last appearance in Blackhawk #139; next appearance in Blackhawk #140)
• Andre (last appearance in Blackhawk #139; next appearance in Blackhawk #140)
• Chuck (last appearance in Blackhawk #139; next appearance in Blackhawk #140)
• Olaf (last appearance in Blackhawk #139; next appearance in Blackhawk #140)
• Chop Chop (last appearance in Blackhawk #139; next appearance in Blackhawk #140)

Villain(s)

• Killer Shark (last appearance in Blackhawk #130; next appearance in Blackhawk #155)
• Killer Shark's henchmen (no further appearances)

Other Character(s)

• Chief Craig (a police chief; no further appearances)
• Mr. Wilks and another unnamed businessman, and an unnamed scientist (no further appearances)

Synopsis:
Killer Shark returns using a weapon that causes sea animals to attack ships. The Blackhawks defend the ships with their mini-subs, but are unable to follow Killer Shark's armada. To find his hide-out, they hide inside a mechanical whale. The whale follows Killer Shark back to his base, where the Blackhawks defeat him.