Comic Title: World's Finest Comics #200
Publisher: DC (National Periodical Publications, Inc.)
Address: 909 Third Avenue, New York, NY
Cover Date: February 1971
On Sale Date: December 10, 1970 Newsstand Date December 10, 1970
Source: Direct Currents, Justice League of America #87, Page 29

Copyright Date December 10, 1970
Source: Library of Congress, Periodicals 1971

Frequency: Monthly, (with the exception of Jan., Apr., and July)
Cover Price: $0.15
Page Count: 32
Editor: Julius Schwartz

Title: "Prisoners of the Immortal World"
Pages: 22

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

Writer: Mike Friedrich
Penciller: Dick Dillin
Inker: Joe Giella

Reprinted In:
Showcase Presents:Robin the Boy Wonder Vol. 1 TPB (2008)
Showcase Presents:World's Finest Vol. 4 TPB (2013)
Robin:The Bronze Age Omnibus HC (2020)
World's Finest:Guardians of Earth HC (2020)

Feature Character(s)

• Superman (last appearance in Justice League #87; next appearance in Batman #230)
• Robin (last appearance in Batman #229; next appearance in Batman #230)

Villain(s)

• Migg and Kartal (alien brothers; no further appearances)
• Three alien hunters (no further appearances)

Other Character(s)

• Davy and Marty (brothers and Hudson University students; next appearance in Batman #230)

Cameo Appearance(s)

• Batman (in flashback to Robin's origin)
• John and Mary Grayson (in flashback to Robin's origin)

Comments:
This story continues in part in Batman #230.

Synopsis:
Clark Kent reports from the campus of Hudson University where Robin is a student. During his broadcast the ROTC building is bombed. Superman and Robin help to keep the peace, but two brothers begin a volatile argument. When the heroes try to break them up, all four are transported to an alien world.

The aliens have kidnapped Superman in order to use him as a human battery for a machine designed to make the aliens immortal. Robin and the brothers are discarded in the alien jungle. Robin and the boys work together to escape from a group of hunters. They then rescue Superman who helps them all get back to Earth.