Spock, a man who prides his closeted sexual nature so highly, seems to love telling Droxine that he doesn't "go for it" until every 7th year of his life.
That aside, there are some astonishingly good performances in a script with real potential.
The ending is a bit too PC, where everything always works out for the best, because the storyline just doesn't want to present a solution. It's a shame as there are many little nice touches (e.g. Plasus reassuring himself that the Trogolytes only know violence as a solution) in this one.
Overall, it's average for season 3: Interesting plot concepts let down by some gaffes in logic (Kirk and Vanna using Vanna's card to beam back to the surface even though Kirk would be recognized and killed in an instant as he's banned from the planet!) and let down by Spock being very Un-Spock-like...