- Script:
- Bill Finger
- Pencils:
- Sheldon Moldoff
- Inks:
- Charles Paris
- Colors:
- ?
- Letters:
- ?
- Genre:
- Superhero
- Characters:
- Batman [Bruce Wayne]; Robin [Dick Grayson]; Mad Hatter [Jervis Tetch]
- Synopsis:
- The Mad Hatter has a superb collection of stolen hats, but with Batman's cowl missing it is incomplete. The Dynamic Duo must then thwart a number of schemes designed to part the Masked Manhunter from his cowl.
- Reprints: show reprint note before migration
1966 Batman T.V. Series, episodes 69 - The Contaminated Cowl and 70 - The Mad Hatter Runs Fowl, were based on this story.
1st appearance of Mad Hatter 2 (see Batman (DC, 1940 Series) #49 (Oct-Nov 1948) for Mad Hatter 1).
Mad Hatter 2 is later revealed as an imposter.
- Script:
- Ed (France) Herron
- Pencils:
- Dick Sprang
- Inks:
- Charles Paris
- Colors:
- ?
- Letters:
- ?
- Genre:
- Superhero
- Characters:
- Batman [Bruce Wayne]; Robin [Dick Grayson]; Firefly [Garfield Lynns]
- Synopsis:
- When theatrical lighting director Garfield Lynns is prevented from staging his first robbery, he makes his escape thanks to the light given off by a firefly. Inspired, he assumes the identity of the costumed criminal, Firefly.
- Reprints: show reprint note before migration
1st appearance and origin of Firefly.
- Script:
- Edmond Hamilton
- Pencils:
- Dick Sprang
- Inks:
- Charles Paris
- Colors:
- ?
- Letters:
- ?
- Genre:
- Superhero
- Characters:
- Batman [Bruce Wayne]; Robin [Dick Grayson]; Barney Barrows [Mental Giant]
- Synopsis:
- A freak accident gives police janitor Barney Barrow a super advanced brain, he then blackmails the Dynamic Duo into aiding him with his ever more dangerous methods of crime fighting.
- Reprints: show reprint note before migration
- Script:
- David Vern
- Pencils:
- Lew Sayre Schwartz
- Inks:
- Charles Paris
- Colors:
- ?
- Letters:
- ?
- Genre:
- Superhero
- Characters:
- Batman [Bruce Wayne]; Robin [Dick Grayson]; The Joker; Brice; Hopkins; Hop Dooley
- Synopsis:
- The Clown Prince of Crime recruits some new members for his gang, all of whom are perfectly suited for specific felonies.
- Reprints: show reprint note before migration
- Script:
- David Vern
- Pencils:
- Lew Sayre Schwartz
- Inks:
- Charles Paris
- Colors:
- ?
- Letters:
- ?
- Genre:
- Superhero
- Characters:
- Batman [Bruce Wayne]; Robin [Dick Grayson]; Gorilla Boss [also as George 'Boss' Dyke]
- Synopsis:
- Executed criminal George 'Boss' Dyke's brain is transplanted into a gorilla's head, after amassing a fortune from his crimes, his next plan is even more bizarre. He intends to transplant his brain again, but this time into Batman's head!
- Reprints: show reprint note before migration
- Script:
- Bill Finger
- Pencils:
- Sheldon Moldoff
- Inks:
- Charles Paris
- Colors:
- ?
- Letters:
- ?
- Genre:
- Superhero
- Characters:
- Batman; Robin; Paul Sloane [Two-Face]; Harvey Dent
- Synopsis:
- Actor Paul Sloane is disfigured in an accident, this unhinges his mind and causes him to turn to crime as the second Two-Face.
- Reprints: show reprint note before migration
The final 2 panels of page 2 and the 1st panel of page 3 have been cut and substituted with 2 newly created panels.
The original story depicted actor Paul Sloane becoming Two-Face after being scarred by a vial of acid, the version in this issue has Sloane being disfigured by an exploding Klieg light.
1st appearance of Paul Sloane, fittingly the second Two-Face.
- Script:
- Bill Finger
- Pencils:
- Sheldon Moldoff
- Inks:
- Charles Paris
- Colors:
- ?
- Letters:
- ?
- Genre:
- Superhero
- Characters:
- Batman [Bruce Wayne]; Robin [Dick Grayson]; Mirror Man [Ventris]
- Synopsis:
- Ventris, a convict, escapes jail with the help of a broken mirror. He adopts the identity of the Mirror Man and sets out to uncover Batman's secret identity by using his X-Ray Mirror.
- Reprints: show reprint note before migration
panel 6 on page 8 has been re-captioned to fix a minor story telling error when originally published.