| Issue | #173 |
| Published | February 1968 |
| Cover Price | 0.12 |
| Pages | 36 |
| Editing | Mort Weisinger; E. Nelson Bridwell (Asst) |
| Characters | Robin; Superman (as Kralik); Batman (as Two-Face) |
| Genre | superhero |
| Pencils | Curt Swan |
| Inks | George Klein |
| Characters | Superman; Batman; Lois Lane; Jimmy Olsen; Two-Face (really Batman), Kralik (really Superman); the Intercrime Gang; Dr. Arron; Fortress of Solitude; Batcave |
| Synopsis | Dr. Arron's Psyche-Distortor chemicals cause complete character reversal in Superman and Batman, turning them into their own worst enemies. |
| Genre | superhero |
| Script | Jim Shooter |
| Pencils | Curt Swan |
| Inks | George Klein |
| Notes | Despite the flashback to a previous battle, this is Kralik's first appearance. |
| Characters | Superman; Lois Lane; Jimmy Olsen; Fortress of Solitude (intro) Batman; Joker (trophy); Green Kryptonite |
| Synopsis | Someone has broken into Superman's Fortress of Solitude, so Superman searches the place for clues. |
| Genre | superhero |
| Script | Jerry Coleman |
| Pencils | Wayne Boring |
| Inks | Stan Kaye |
| Reprinted | from Action Comics (DC, 1938 series) #241 (June 1958) |