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.
Trivia: Fans have long speculated what Jack whispers to Nina in this episode. According to Kiefer Sutherland the scripted line was "I am going to hunt you down for as long as you live" but what he actually whispered was "I love you Sarah, why did you marry Xander?" Sarah is the name of the actress playing Nina and she is married to Xander Berkley who played George Mason. Apparently Sutherland whispered this to get a more interesting reaction from Nina.
Trivia: The final scene of this episode was filmed with a "false beat" ending that showed Palmer standing up again straight after Mandy's attack and getting back into his limo. This was done to stop anyone other than the those who needed to, knowing the ending of the series before it was aired.