The Qomar city as seen from the
surface is the same city used in "Year of Hell". It resembled a
Zahl colony, which was eradicated by Annorax.
The Komar (pronounced identically)
was the name of the non-corporeal race of aliens that took
control of Tuvok in "Cathexis".
The Doctor's suggestion that he
delete his musical subroutine as punishment for his actions is
similar to an offer he will make in "Renaissance Man" to delete
his modified programming after disobeying Captain Janeway's
direct orders.
Several costumes from this episode
were sold off on the It's A Wrap! sale and auction on eBay,
including the costumes of Zadrina, J.R. Quinonez, and William
Smith.
The blue synthesizer played by one
of the Harry Kim and the Kimtones members is a Yamaha CS1x. The
back of the synthesizer (bearing the Yamaha logo and various
input/output ports) was disguised with a metallic-looking plate.
One of the Qomar spectators is the
actor Leonard Crofoot, who played two characters in Star Trek:
The Next Generation; Trent, the male servant of Mistress Beata
from "Angel One" and Data's neutral-gender "child" in "The
Offspring".