After the September 11 attacks in New York City, actor Kevin Conroy participated in relief efforts by volunteering to cook for police officers and firefighters. During the audio commentary for Batman: Gotham Knight, Conroy expressed his surprise at the reaction to his presence. At the behest of another cook, Conroy called out from the kitchen to the dining area in his Batman voice "I am vengeance! I am the night! I am Batman!" This was greeted by cheers and applause from the emergency service personnel, many of whom were fans of Batman: The Animated Series. Conroy said he was humbled and deeply flattered by the reaction.