Fan Casting Batman: Arkham - Episode 7: Back to Intensive Treatment

Batman faces giant plants to get to Arkham Mansion. He encounters Aaron Cash, who tells him that the only way to reach Killer Croc's sewers is through Intensive Care.
Batman returns to the facility, where he faces more of The Joker's henchmen.
On the way, Batman is once again drugged by Scarecrow.
He sees himself being taken to the Intensive Treatment Center by The Joker and Harley Quinn. The Joker shoots and kills him.
Batman emerges from the grave where he was buried, and once again faces off against the giant Scarecrow.
Batman defeats him, but Scarecrow injects him with an immense amount of fear toxin, enough to drive ten men insane.
Once again, Batman defeats his fears, leaving Scarecrow in shock.
The Scarecrow flees to Killer Croc's lair. Batman heads into the sewers.
Scarecrow says that if Batman approaches, he will release the toxin into the water, which will affect the entire city.
From the water, Killer Croc emerges and grabs Scarecrow. Batman throws a Batarang that hits the shock collar, forcing Killer Croc back into the water, but taking Scarecrow with it.