The fact that the secondary bridge was left in the catwalk after The Catwalk (2002) may demonstrate the original Starfleet concept of a battle bridge or Auxiliary Control Center.
This episode was nominated for an Emmy Award for Outstanding Special Visual Effects for a Series.
This is the third and final appearance of Crewman Michael Rostov, who appeared twice during the first season. Though never again seen onscreen after this episode, he is mentioned at least twice in the third season.
Trip experiences himself transported home to Tarpon Springs, Florida, a suburban beach & fishing community west of Tampa and north of Clearwater. Tarpon Springs, notable for its sponge fishing, claims to be home to the second largest Greek population next to Greece itself.
The wall mounted circular device that Malcolm uses just before being chased by a "wisp" has four protrusions around the outer edge. They are the same design as Uhura's ear piece from the original Star Trek (1966).