Comic Title: Superman #228
Publisher: DC (National Periodical Publications, Inc.)
Address: 909 Third Avenue, New York, NY
Cover Date: July 1970
On Sale Date: May 5, 1970 Newsstand Date May 5, 1970
Source: House Ad, Batman #223, Page 42

Copyright Date May 5, 1970
Source: Library of Congress, Periodicals 1970

Frequency: Monthly, with the exception of March and September
Cover Price: $0.15
Page Count: 32
Editor: Mort Weisinger

Title: "The Mystery Bombers"
Pages: 13

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

Writer: Bob Haney
Penciller: Curt Swan
Inker: George Roussos

Feature Character(s)

• Superman (last appearance in Action Comics #389; next appearance in Superman #228)

Supporting Character(s)

• Jimmy Olsen (last appearance in Action Comics #389; next appearance in Superman #228)

Villain(s)

• The T.N.T. Twosome (aliens; no further appearances)

Synopsis:
Clark Kent receives a phone call from the T.N.T. Twosome which declares a bomb threat. Using the clue provided by the bombers, Superman learns the bomb's location and is able to stop it. When the bombers phone in additional threats and clues, Superman solves their riddles and finds the bombs. He also notices that the bombers do not provide a deadline for finding the bombs,

One last clue is received. Superman acts on it and is led to a suburban house. Inside is a message from the bombers. They are aliens. They wanted Superman to solve the riddles which required him to acquire massive amounts of knowledge on specific topics. The aliens then drain his brain of the information, which they intend to sell. However, Superman had deduced their plan and scrambled the knowledge. The aliens leave Earth believing that they have won, but Superman has actually ensured their defeat.