| Release: | Aug 1960 |
| Cover: | Aug 1960 |
Superman's Secret Kingdom / The Crimes of the Clock King
| Release: | Aug 1960 |
| Cover: | Aug 1960 |
Superman's Secret Kingdom - Superman has been missing for a week, when he travelled to South America in pursuit of a criminal. Batman and Robin travel to find him, but what they find is something they never expected.
The Crimes of the Clock King - The latest villain has appeared, running several clock-themed crimes.
| Writer | Bill Finger, Ed 'France' Herron |
| Cover Penciller | Curt Swan |
| Cover Inker | Sheldon Moldoff |
| Penciller | Dick Sprang, Lee Elias |
| Inker | Dick Sprang, Sheldon Moldoff |
| Batman | Bruce Wayne |
| Superman | Kal-El / Clark Kent |
| Green Arrow | Oliver Queen |
| Robin | Dick Grayson |
| Speedy | Roy Harper |
| Clock King | William Tockman |
| Tommy Tomorrow |
| Age | Silver Age |
|---|---|
| Format | Comic |
| Series Group | Superman / Batman |
| Genre | Action | Adventure | Super-Heroes |
| No. of Pages | 32 |
| Country | USA |
| Language | English |