Relics (1992) was initially intended to be filmed in this episode slot, but was pushed forward due to the schedule of guest star James Doohan. Consequently, this episode was written in a rush.
This is the first episode to feature the newly sounded red alert lights, which is longer between each time it sounds.
The first Trek episode where Jonathan West became the director of photography, taking over from Marvin V. Rush who moved to the soon to begin Star Trek: Deep Space Nine (1993). There were a few subtle differences to the show's visual style after the change over.