Comic Title: Superman #105
Publisher: DC (National Comics Publications, Inc.)
Address: 480 Lexington Avenue, New York, NY
Cover Date: May 1956
Approx. On Sale Date: March 13, 1956 Copyright Date March 11, 1956
Source: Library of Congress, Periodicals 1956
Until 1958 DC did not report actual on sale dates to the copyright office
The publication dates listed in LoC records are NOT release dates.

Frequency: Monthly, with the exception of April, June, Oct., and Dec.
Cover Price: $0.10
Page Count: 32
Editor: Mort Weisinger

Title: "Superman's 3 Mistakes"
Pages: 8

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

Writer: Edmond Hamilton
Penciller: Wayne Boring
Inker: Stan Kaye

Feature Character(s)

• Superman (last appearance in Action Comics #215; next appearance in Superman #105)

Supporting Character(s)

• Lois Lane (last appearance in Action Comics #215; next appearance in Superman's Pal Jimmy Olsen #13)

Guest Appearance(s)

• Superboy (last appearance in Adventure Comics #223; next appearance in Adventure Comics #224)
• Jonathan Kent (last appearance in Adventure Comics #223; next appearance in Adventure Comics #224)

Other Character(s)

• Mr. Jarvis, James Burns, and George Verrel (an irrigation expert, an astronomer, and a map maker; no further appearances)

Cameo Appearance(s)

• Martha Kent (in flashback to Kal-El's arrival on Earth)
• It (in flashback to the first story of Action Comics #162)

Comments:
This story contains several flashbacks to adventures in Superman's past.

Flashback 1: (page 2, panel 4) The Kents find Kal-El. This flashback recounts scene 4 from the third story of More Fun Comics #101.

Flashback 2: (page 2, panels 5-7) Superboy nearly gives away his secret identity by flying through the Kent's window. Eventually this will lead to the construction of an underground tunnel. This flashback occurs chronologically between the first story of Adventure Comics #223 and the first story of Adventure Comics #224.

Flashback 3: (page 3, panels 4-5) Clark moves to Metropolis. This flashback occurs between the second story of Superman #359 and the flashback in the first story of Superman's Girl Friend Lois Lane #55.

Flashback 4: (page 3, panel 6) Superman battles It. This flashback recounts the first story of Action Comics #162.

Several other flashbacks give no indication of when they occured. (page 4, panels 1-4) Superman stops a dam from breaking. (page 5, panel 3) Superman stop a gang of tank bandits. (page 5, panel 4) Superman saves a plane. (page 5, panel 5 - page 6, panel 1) Superman stops a dumbbell shaped meteor. (page 6, panel 6) Supermam battles a robot duplicate. (page 7, panels 2-4) Superman battles a dinosaur.

It is assumed that these flashbacks immediately preceed this story.

Synopsis:
Clark Kent receives a letter indicating that someone knows his secret identity. To solve the mystery, Superman searches his memory for mistakes he has made in protecting his secret. He recalls three mistakes and acts to correct them. He then tests the men who could have learned his identity from the errors, but none of them is responsible for the letter. Superman eventually determines that the letter was mailed posthumously by Jonathan Kent to keep Clark on his toes and protect his secret.