Fan CastingBatman: Arkham - Episode 6: Botanical Gardens

Now knowing that The Joker intends to build an army of mutants with Titan, Batman heads to the Botanical Gardens. Batman finds The Joker holding a guard hostage. With the path blocked with electrocuted water, he throws the guard, killing him, and flees. Needing to find another way, Batman heads to the generator room. Upon arrival, he finds a janitor kidnapped by prisoners. After defeating them and saving the janitor, Batman turns off the power, allowing his passage. Following Harley Quinn's tracks, Batman finds the secret laboratory. The Joker uses the now complete Titan serum on two henchmen, turning them into mutants, to keep the Dark Knight busy while he escapes. Batman defeats the mutants and destroys the facility. Starting to think about an antidote, Batman tells Oracle that he believes Poison Ivy can help him, as Titan is produced from genetically modified plants. Batman arrives at the glasshouse and asks for help, but Ivy refuses. Batman threatens to make all Arkham plants suffer unless she cooperates. With the threat, Ivy informs him that the antidote can only be made with rare spores found in the sewers, where Killer Croc lives. As Batman leaves, The Joker announces that he has provided Ivy with some of the titan serum, causing her plants to grow to gigantic proportions, which slowly begin to cover the island. Not knowing where Killer Croc's lair is, Batman heads to Arkham Mansion to ask Aaron Cash.