This is the only episode in the series to contain the expletive "goddamn." The word is uttered by Tony Almeida about 32 minutes into the episode, just after Jack engages a hostile in the shipyard.
Connor Trinneer, who portrays port authority officer Carl Gadsen, also plays Charles "Trip" Tucker III on Star Trek: Enterprise -- another show that involves 24 producers/writers Brannon Braga and Manny Coto. "Trip" is a nickname for a tertiary, same-named child ("the third") as opposed to "II", "junior" or "the second."
Oddly enough, he is seen/heard talking on his cell phone with his wife about their expected twin girls, and when asked what the doctor said the wife replies, "...i'm lucky it's not *triplets*.
Carl also states (while he and his wife were trying to have kids) "it took us *three* years."