This is the last episode where the intro shows the Twin Towers. They were edited out of later episodes due to the 9/11 attacks that caused their destruction.
The scene where Aidan proposes to Carrie was shot on the street Woody Allen and Soon-Yi Previn lived. They were standing by the window watching the shoot.
In the edit of the episode that originally aired, while giving Charlotte her hormone injection, Trey says, "You have more hormones in you than a Perdue chicken." That line was later changed to, "You have more hormones in you than a teenage boy."