Having a Batman: Arkham Knight Riddler guide to hand is essential ... use the Remote Hacking Device on it to reveal her Batgirl suit. Scan this to solve the riddle. Solved within the GCPD Lockup.

The latest evolution of Batman lore just gave Robin a surprising new costume, bringing him closer to the Dark Knight's own design ... Grayson attend a fire at Arkham Asylum in 1976.