Trivia: Stephen Merchant, co-creator of "The Office" (original UK version) makes a cameo as a CTU worker who Nadia Yassir hands a document to. Merchant's co-creator/star, Ricky Gervais, also filmed a cameo as a presidential aide, but was eventually cut; Gervais' cameo is located in the deleted scenes on the DVD box set.
Trivia: On the DVD, the writers revealed that they originally planned for a subplot regarding Josh Bauer's paternity. Originally the idea was that he would turn out to be Jack's son, but this idea was later changed into him being Philip Bauer's son. This idea wasn't scrapped until they wrote the final episode of the season. Philip Bauer was going to reveal the truth to Josh at the oil rig, but the idea was abandoned because it would add too much drama to an already dramatic situation.