Many actors who appear in this episode have previously appeared on episodes of 'ER' with Laura Innes, including Clifton Collins Jr., Zeljko Ivanek, Clea DuVall, Michael Whaley, and Scott Michael Campbell. Evan Katz, executive producer of "The Event," has similarly worked with many actors in this episode on episodes of "24" including Campbell, Ian Anthony Dale, Bill Smitrovich, D.B. Sweeney and Omid Abtahi. Series regular Lisa Vidal, who does not appear in this episode, has also worked with Innes on "ER" and Zeljko Ivanek played a main villain on "24" during the first season, long before Katz was a show runner.