I have to chase you all night long and watch Batman take down the Russian with one punch! I have to fight my way through the legion of losers, a small mountain that thinks we're engaged, faces, both clay and two – plus I outsmarted the Joker! At the very least, I wanted to clean Riddler's clock! 
- — Batgirl
Batman Confidential #21 is an issue of the series Batman Confidential (Volume 1) with a cover date of November, 2008.
Synopsis for "The Cat and the Bat, Conclusion"
Batgirl is locked inside Arkham Asylum, and the Riddler has unleashed the inmates. Batgirl fights them or outsmarts them all while the Riddler monologues on the sound system.
The Riddler has given her several clues that help her figure out the access code to the security control room; however, by the time she gets inside, Catwoman has already taken care of the Riddler. Catwoman hands Batgirl Gordon's notebook.
They meet up with Batman, who has stopped the Russians. Batgirl leaves to meet her father, but she still hears when Batman asks what Catwoman thinks of Batgirl and she admits that "she's got the chops."
Pleased, Batgirl returns home to sleep, only to be woken up by her alarm as soon as she gets in bed.
Appearing in "The Cat and the Bat, Conclusion"
Featured Characters:
Supporting Characters:
Antagonists:
- Riddler
- Catman
- Cavalier
- Signalman
- Blockbuster
- Joker
- Two-Face
- Clayface
- Scarecrow
- Mad Hatter (Cover only)
- Anatoly Davidovitch (Mentioned only)
Other Characters:
- Comissioner Gordon (Mentioned only)
- Robin (Mentioned only)
Locations:
Items:
Vehicles:
Notes
- Collected in Batman: The Cat and the Bat.
- Batgirl references the events of Batgirl: Year One #8.