Batman: Arkham - Episode 8: Old Sewers

Season 1: Asylum

Batman starts to walk in the sewers. Realizing it's like a maze, he asks Oracle for help. Barbara says there is no record, and says it could be a suicide mission. Batman makes preparations, and enters Killer Croc's lair. Despite Killer Croc's constant attacks, Batman gathers the necessary spores to create the antidote. On the way out, Killer Croc makes a big surprise attack, and charges at Batman, but the Dark Knight activates the explosive gel he had prepared, sending Killer Croc crashing into the sewer. Through the sewers, Batman returns to the Batcave, where he creates an antidote to stop Poison Ivy from taking over Arkham. Barbara says that earthquakes are being felt on the island, a sign of the rampant growth of Poison Ivy plants. On the way, Oracle informs them that The Joker intends to contaminate Gotham's water supply with his Titan production. Batman disables the three pumping stations guarded by the henchmen, infuriating The Joker, who sends a Titan henchman to kill him. Batman faces him and wins. Batman returns to the surface, where he notices that Ivy is getting stronger. Through the plants, Poison Ivy says that the island belongs to her, and that she will kill Batman, and then kill The Joker. Batman heads to the Botanical Gardens to face her.