The Sleuth Without A Clue – The chief will be forced to resign if a string of robberies isn’t solved soon, and John Jones promises to get the job done. Unfortunately, a comet is blocking the martian rays that give him his superpowers, forcing him to pursue the case as if he were human.
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| Character | The Mad Hatter (Jervis Tetch), Robin (Dick Grayson), Martian Manhunter (J'onn J'onzz), Batman (Bruce Wayne) |
| Cover Date | April 1956 |
| Issue | 230 |
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| Artist | Joe Certa |
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| Writer | Jack Miller |
