Starships: Class
Just after the opening credits, as the episode title appears a starship can be seen circling Deep Space Nine. It is an Intrepid class starship, the most famous of which is the USS Voyager. Just before Doctor Bashir's parents leave the station, a Nebula class starship is seen on one of the lower pylons. Finally, at the end of the episode, two Excelsior class starships are seen circling the station and an Ambassador class is shown docked on one of the upper pylons.

At the end of the episode, Captain Sisko introduces Bennett to Doctor Bashir as a Rear Admiral. However, the Admiral's collar shows four gold pips encased in a gold frame, signifying that Bennett is a full Admiral. A Rear Admiral would only have two pips within a frame.

Admiral Bennett refers to the Eugenics Wars in this episode. However, he incorrectly says that the wars were fought 200 years ago. In an internet chat after this episode had aired, Ronald D. Moore, teleplay for this episode, has gone on record saying that at the time he had been thinking of Star Trek II: Wrath of Khan. In the movie, Khan had said that he was a great force over 200 years ago. The number stuck in Moore's head and he inserted it into the script.