- Script:
- Gardner Fox
- Pencils:
- Sheldon Moldoff [as ghost for Bob Kane]
- Inks:
- Joe Giella
- Colors:
- ?
- Letters:
- Gaspar Saladino
- Genre:
- Superhero
- Characters:
- Batman [Bruce Wayne]; Robin [Dick Grayson]; Smiles Dawson (first appearance); Roger Peale (first appearance); Riddler [Edward Nigma] (villain; 5-page history); Molehill Mob (villains)
- Synopsis:
- The Riddler returns, and once again plagues Batman and Robin with riddles, while maintaining his innocence.
- Reprints: show reprint note before migration
First appearance of Riddler since 1940's. Credits for script and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics. Records show that Bob Kane was paid for the pencils, but scholars agree that pencils were actually by Moldoff.