The first plot information about "The Siege, Part 2" was released in November, 2004. In the original script, Colonel Dillion Everett was supposed to be a recurring character in the series future along with his two United States Marine Corps officers Major Ferrell and Captain Radner, the announcement also suggested the involvement of Dr. Radek Zelenka. All of the characters, with the exception of Zelenka were killed off in "The Siege, Part 2". Another announcement later on in January, 2005 did not include any references to Dillion and his two marines.