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| Publisher |
DC |
| Series |
Action Comics |
| Published | May 1987 |
| Artist |
John Byrne |
| Writer |
John Byrne |
| Inker |
John Byrne |
| Cover Artist |
John Byrne |
| Inker |
Keith Williams |
| Colorist |
Tom Ziuko |
| Letterer |
John Costanza |
PAST IMPERFECT Superman is transported to another time when he tries to catch up with Superboy and the Legion of Super-Heroes