The character Alberta Green is named for actress Alberta Watson, whom show creator Joel Surnow originally wanted to portray the role that eventually went to Tamara Tunie. An Agent Watson was later the recipient of a phone call. Ironically, Alberta Watson later joined the show during the fourth season as Erin Driscoll, the new head of CTU in Los Angeles.
Jack's recap monologue is now different: "There are terrorists planning to assassinate a presidential candidate, my wife and daughter have been kidnapped, and the people that I work with may be involved in both. I'm Federal Agent Jack Bauer. This is the longest day of my life." [The closed captioning still showed his old monologue, however.]
Tony downloads an encrypted email onto a floppy disk for Milo to decrypt. This type of disk was called a ZIP disc, it was a member of the last generation of floppy discs called superfloppies and was by far the most popular of the type. First released in March of 1995 the ZIP drive/disc offered a huge leap in removable storage capacity at the time, as the standard 3.5" floppy disc in common use only had a capacity of 1.44 MB, whereas the first generation ZIP disc held 100 MB, later on discs with 250 MB and 750 MB capacities were released. As of the airing of this episode ZIP drives and discs were quickly becoming obsolete, they started falling out of favor in the early 2000's as the favored type of removable storage and were replaced with CD-RW's and USB flash drives, which had much higher capacities and read/write speeds.
The character Ted Cofell is named after one of the producers' assistants, Anne Cofell.