Comic Title: Action Comics #248
Publisher: DC (National Comics Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: January 1959
On Sale Date: November 26, 1958 Copyright Date November 26, 1958
Source: Library of Congress, Periodicals 1958

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

Title: "The Man No Prison Could Hold"
Pages: 12

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

Writer: Bill Finger
Penciller: Wayne Boring
Inker: Stan Kaye

Reprinted In:
Showcase Presents Superman Vol. 1 TPB (2005)
Superman:The Man of Tomorrow Archives Vol. 2 HC (2006)

Feature Character(s)

• Superman (last appearance in Superman's Pal, Jimmy Olsen #34; next appearance in World's Finest Comics #99)

Supporting Character(s)

• Jimmy Olsen (last appearance in Superman's Pal, Jimmy Olsen #34; next appearance in Superman #127)

Villain(s)

• Von Kamp and his men (no further appearances)

Synopsis:
Superman traces a suspicious satellite back to an uncharted island. An ex-Nazi, Von Kamp, is running a slave colony and working on a secret project. Superman goes undercover as Clark Kent to discover what "Project X" is. He is unknowingly followed by Jimmy Olsen.

Both Clark and Jimmy are captured and forced to work in the camp. Clark is forced to secretly use his super powers to help Jimmy, but the strange events cause Von Kamp to order Jimmy’s execution.

Clark, as Superman, prevents Jimmy’s execution. He also learns that "Project X" is a large spy satellite that Von Kamp has built. Superman convinces them the satellite fails to work, and then captures the slavers.