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| Publisher |
DC |
| Writer |
Carl Wessler |
| Writer |
Sid Gerson |
| Artist |
George Roussos |
| Penciler |
Frank Giacoia |
| Inker |
Sy Barry |
| Published | May 1968 |
1. The Doorway into Time (Johnny Peril / written by Howard Purcell) 2. Probability Zero (written by Sid Gerson : reprinted from: Strange Adventures #32) 3. Roehmer's Revenge (written by Carl Wessler : reprinted in: Unexpected #161)
