24: The Longest Day is a single containing trance remixes of Sean Callery's "24" Theme by famed Dutch DJ Armin van Buuren. The tracks are available as a CD single or online from iTunes. One of the remixes appeared in "Day 4: 1:00am-2:00am" in the nightclub within which Habib Marwan recorded his message that he planned to be shown after his nuclear bombing occurred. A music video for the Longest Day was included as a special feature on the fourth season DVD.