In Batman: The Long Halloween, the Riddler appears as an informant. He first appears when Carmine "The Roman" Falcone hires him to figure out who the Holiday Killer is. Falcone eventually loses his patience with Riddler, however, and orders his daughter Sophia to force him to leave. Upon exiting Falcone's office, Holiday attacks Riddler, but for some reason leaves him alive. The attack was planned to coincide with the holiday of April Fool's, and several items pertaining to it were left at the scene. This may be why Riddler was left alive, as matters are traditionally reversed on the holiday. He appeared again in the same chapter of the story in which Harvey Dent is disfigured, when Batman comes to him for information about the attack. He plays a slightly larger role in the story's sequel Batman: Dark Victory, in which Batman turns to him to figure out the significance of the lost games of hangman that are left at the scenes of the Hangman killer's crimes. He later showed up as a member of Two-Face's jury during the Hangman's trial.