Trivia: Jack's opening monologue changed subtly as the season moved on. It began, "Right now, terrorists are plotting to assassinate a presidential candidate, and my teenage daughter is missing." It then became, "...and my teenage daughter has been kidnapped," then "...my wife and daughter have been kidnapped," then, "...my wife and daughter are in danger," and finally, "...my wife and daughter have been targeted."
Trivia: Alberta Green, who makes her first appearance in this episode, was named for actress Alberta Watson, whom series creator Joel Surnow originally wanted to play the role. Ironically, Watson played Erin Driscoll, a character that is by-the-book, much like Green is, in Season 4.
Trivia: We get the impression from the first few episodes that Nina is trustworthy only to find out in the last 2 episodes that she was the main mole inside CTU. It's funny though that it was in front of our eyes the whole time, by accident or design: Every time that Jack says his famous starting monologue, when he comes to the part "and people I work with might be involved in both..." we see Nina looking at Jack.
Trivia: Both Sarah Clarke and Xander Berkeley have played turncoat government agents assisting terrorists attempting to assassinate the President. Clarke on 24, and Berkeley in the film Air Force One, when the President interferes with the terrorists' insidious plan. Ironically, the pair began dating during season one, and by season two, they were married.
Trivia: At the end of the episode, Jack takes Kate out of CTU. When Tony tries to stop them, Jack throws him to the floor and he falls badly on his ankle. Tony spends the rest of the season on crutches. The reason for this is that Carlos Bernard, who plays Tony, broke his ankle playing basketball so the writers had to alter the script to take this into account.