Comic Title: Adventure Comics #268
Publisher: DC (National Comics Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: January 1960
On Sale Date: November 25, 1959 Newsstand Date November 25, 1959
Source: House Ad, Superboy #78, Page 21

Copyright Date November 25, 1959
Source: Library of Congress, Periodicals 1959

Newsstand Date November 25, 1959
Source: Newsdealer Magazine, V14 #9

Frequency: Monthly
Cover Price: $0.10
Page Count: 32
Editor: Mort Weisinger

Title: "The Week That Clark Kent Lost His Memory"
Pages: 12

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

Writer: Jerry Siegel
Artist: Al Plastino

Feature Character(s)

• Superboy (last appearance in Superboy #78; next appearance in Adventure Comics #269)

Supporting Character(s)

• Jonathan Kent (last appearance in Superboy #78; next appearance in Adventure Comics #269)
• Martha Kent (last appearance in Superboy #78; next appearance in Adventure Comics #269)
• Lana Lang (last appearance in Superboy #78; next appearance in Superboy #79)
• Krypto (last appearance in Adventure Comics #267; next appearance in Adventure Comics #269)

Villain(s)

• Some unnamed jewel thieves and some counterfeiters (no further appearances)

Other Character(s)

• Edwin Merritt (an editor; no further appearances)
• A baseball team (no further appearances)

Synopsis:
While trying to capture some jewel thieves, Superboy is exposed to some Red Kryptonite in his Clark Kent identity. The Kryptonite gives him amnesia and temporarily causes him to black out. While unconscious, he is carried away from Smallville until he is found by an encyclopedia editor.

Clark has to relearn English from speed-reading a dictionary and an encyclopedia. Then he sets out into the world. His identity is nearly given away several times, but fate intervenes to protect him. Clark finally believes that he is a defective Superboy robot.

Krypto locates the missing Boy of Steel and jars him into remembering his identity.