Comic Title: Superman's Pal Jimmy Olsen #123
Publisher: DC (National Periodical Publications, Inc.)
Address: 909 Third Avenue, New York, NY
Cover Date: September 1969
On Sale Date: July 10, 1969 Copyright Date July 10, 1969
Source: Library of Congress, Periodicals 1969


Newsstand Date July 10, 1969
Source: Newsdealer Magazine, V24 #5

Frequency: Monthly, with the exception of Feb., May and Nov.
Cover Price: $0.15
Page Count: 32
Editor: Mort Weisinger

Title: "The Sacrifice of Jimmy Olsen"
Pages: 10

Feature(s):
Jimmy Olsen (of Earth-1)

Writer: Leo Dorfman
Penciller: Curt Swan
Inker: George Roussos

Feature Character(s)

• Jimmy Olsen (last appearance in Action Comics #379; next appearance in Superman's Pal Jimmy Olsen #124)

Supporting Character(s)

• Superman (last appearance in Adventure Comics #383; next appearance in Superman's Pal Jimmy Olsen #124)
• Lois Lane (last appearance in Action Comics #379; next appearance in Superman's Pal Jimmy Olsen #124)
• Perry White (last appearance in Action Comics #379; next appearance in Action Comics #380)

Other Character(s)

• Hal Rand (appears as Mark Olsen in this story; true identity revealed in Superman's Pal Jimmy Olsen #124; first appearance; next appearance in Superman's Pal Jimmy Olsen #124)
• Tom Wright (an estate manager; no further appearances)
• An unnamed butler (next appearance in Superman's Pal Jimmy Olsen #124)
• A chauffeur (no further appearances)

Comments:
This story continues in the second story of Superman's Pal Jimmy Olsen #124.

Synopsis:
Jimmy Olsen receives several extravagant gifts for his birthday from an unknown source. A chauffeur offers to bring him to the mystery man who claims to be Mark Olsen, Jimmy's father. Jimmy believes that his father died years ago in a train accident, but this man appears to have items linking him to Jimmy.

Jimmy finally meets the man claiming to be his father. The man is a prisoner in a glass cage on the property of his own enormous estate. After speaking to his father privately, Jimmy agrees to take his father's place in the glass cage for one year. He uses his signal watch to summon Superman and explain his absence. The Man of Steel is curious about the crime that Mark Olsen committed that caused him to be imprisoned in the cage.