Comic Title: Superboy #186
Publisher: DC (National Periodical Publications, Inc.)
Address: 909 Third Avenue, New York, NY
Cover Date: May 1972
On Sale Date: March 28, 1972 Newsstand Date March 28, 1972
Source: Direct Currents, Superman #251, Page 35

Newsstand Date March 28, 1972
Source: Comic Reader, #82

Copyright Date March 28, 1972
Source: Library of Congress, Periodicals 1972

Frequency: Monthly, (semi-monthly May)
Cover Price: $0.25
Page Count: 48
Editor: Murray Boltinoff

Title: "The Marauders from Thunderbolt Island"
Pages: 16

Feature(s):
Dial H for Hero (of Earth-1)

Writer: Dave Wood
Artist: Jim Mooney

Reprinted From:
House of Mystery #157 (1966)

Feature Character(s)

• Robby Reed (last appearance in House of Mystery #156; next appearance in House of Mystery #158)

Supporting Character(s)

• Gramps (last appearance in House of Mystery #156; next appearance in House of Mystery #158)
• Miss Millie (last appearance in House of Mystery #156; next appearance in House of Mystery #158)
• Joey and Bart (last appearance in House of Mystery #156; next appearance in House of Mystery #158)

Villain(s)

• Mr. Thunder (last appearance in House of Mystery #156; next appearance in House of Mystery #168)
• Thunderbolt (last appearance in House of Mystery #156; next appearance in House of Mystery #170)

Comments:
Robby Reed becomes Human Bullet, Super-Charge, and Radar-Sonar Man in this story.

Synopsis:
The Thunderbolt organization uses a floating island fortress to steal the cosmic computer, a device capable of opening any lock. Robby Reed learns about the theft and dedudes the crooks' first crime. As the Human Bullet he interrupts a bank robbery. Robby captures two gang members. Mr. Thunder gets away, but Robby finds a clue to the next crime.

Robby studies the clue and learns that Mr. Thunder plans an armored car robbery next. Robby dials again and becomes an energy creature called Super-Charge. At the robbery scene, Super-Charge destroys the cosmic computer, but Thunderbolt captures him.

Super-Charge is held prisoner in a Thunderbolt cell, but he dials O-R-E-H to become Robby again. Robby is able to escape and learn about Mr. Thunder's plot to torpedo the business district from his island fortress. Robby becomes Radar-Sonar Man and stops the torpedo attack. Then Mr. Thunder and his gang are finally captured by authorities.