Batman Arkham Asylum 100% Walkthrough Part 6

Episode 6 - The Botanical Gardens Batman navigates the Penitentiary with the aid of the Cryptographic Sequencer, & imprisons Harley Quinn after obtaining a scan of her fingerprints. The Dark Knight heads for the Botanical Gardens to locate Joker's hidden lab. Once inside, the Caped Crusader goes to the glasshouse generator room to disable a power grid.