| Issue | #121 |
| Published | February 1959 |
| Cover Price | 0.10 |
| Pages | 36 |
| Editing | Whitney Ellsworth |
| Characters | Batman; Robin; Mr. Zero (later renamed Mr. Freeze) |
| Genre | superhero |
| Pencils | Curt Swan |
| Inks | Stan Kaye |
| Letters | Ira Schnapp (credit by O'Hearn/Desris) |
| Reprinted | in Batman Special Reprint [Batman 121] (DC, 1997 series) #nn |
| Genre | informational |
| Characters | Batman [Bruce Wayne]; Robin [Dick Grayson]; Alec Wyre; Jigger Mulane; Dan Dolson; Hank Purdy. |
| Synopsis | As Bruce and Dick head for the Bat-Cave to change to their other identities as the caped crimefighters, they discover a dead body.....the body of a mna known for selling secrets to the underworld. Batman & Robin therefore must discover IF this man "sold" the secret location of the Bat-Cave to underworld thugs. |
| Genre | superhero |
| Script | Bill Finger (credit by O'Hearn) |
| Pencils | Sheldon Moldoff |
| Inks | Charles Paris (verified by Paris) |
| Letters | Stan Starkman |
| Notes | Synopsis added by Craig Delich 11-15-07. |
| Reprinted | In Batman (DC, 1940 series) #218 (January-February 1970). |
| Genre | gag |
| Script | Henry Boltinoff (signed) |
| Pencils | Henry Boltinoff (signed) |
| Inks | Henry Boltinoff (signed) |
| Letters | Henry Boltinoff |
| Characters | Batman [Bruce Wayne]; Robin [Dick Grayson]; V: Duds Decker |
| Genre | superhero |
| Script | Bill Finger (credit by O'Hearn) |
| Pencils | Sheldon Moldoff |
| Inks | Charles Paris (verified by Paris) |
| Letters | Ira Schnapp (credit by O'Hearn/Desris) |
| Genre | crime |
| Letters | typeset |
| Genre | gag |
| Script | Henry Boltinoff (signed) |
| Pencils | Henry Boltinoff (signed) |
| Inks | Henry Boltinoff (signed) |
| Letters | Henry Boltinoff |
| Characters | Batman [Bruce Wayne]; Robin [Dick Grayson]; I & V: Mr. Zero, later called Mr. Freeze |
| Synopsis | A scientist accidently falls victim to the effects of an experiment, making him a virtual "human icicle", a foe who puts the chill on Batman and Robin. |
| Genre | superhero |
| Script | Dave Wood (credit by O'Hearn) |
| Pencils | Sheldon Moldoff |
| Inks | Charles Paris (verified by Paris) |
| Notes | Synopsis added by Craig Delich 10-4-07. |
| Reprinted | in Batman (DC, 1940 series) #176 (December 1965); in Batman Special Reprint [Batman 121] (DC, 1997 series) #nn |
| Genre | adventure |