| Issue | #21 |
| Published | July 2006 |
| Cover Price | 2.25 USD |
| Pages | 36 |
| Editing | Nachie Castro |
| Characters | Batgirl; Mr. Freeze; Firefly |
| Genre | superhero |
| Pencils | Dave McCaig |
| Inks | Dave McCaig |
| Colors | Dave McCaig |
| Characters | Batman; Batgirl [Barbara Gordon]; Mr. Freeze; Firefly; Rupert Thorne; Alfred Pennyworth; Commissioner James Gordon |
| Synopsis | When Batman is trapped by Mr. Freeze, Batgirl has to save him and Gotham City, but Firefly is after Freeze too! |
| Genre | superhero |
| Script | Bill Matheny |
| Pencils | Christopher Jones |
| Inks | Terry Beatty |
| Colors | Heroic Age |
| Letters | Phil Balsman |
| Script | ? [as Johnny DC] |
| Letters | typeset |
| Notes | Art and letters submitted by Cole Hutto; Sean McMichael; Tia Mammina; Brandon Wagenfeld; Chris Stow; Joe Fragoso; Philip Boynton |