Towards the end of the episode, suggestions of "a western" and "a detective story" are made by the crew in the mess hall. Both were running gags on the Enterprise holodecks of Star Trek: The Next Generation (1987).
Kes appears only as a hologram, with the same hairstyle she sports for most of the first three seasons.
47 references: the holo-novel has been accessed 47 times by 33 different crew members. And Tuvok's security clearance to add to the holo-novel is 'Tuvok 4774'.
First and only time Tom wears an Operations uniform .
This takes place in 2373.