This week, we return to one of the least revisited eras of Trek for a whodunit with the second-string team. An overbearing seductress causes problems for her daughter and her ex; the ship’s guests have a Gordian knot of ideas about harmony and balance and honor that need untangling; and a spy is sneaking around the ship trying to sabotage the negotiations. Why would Spock allow his captain to use a program he knows is unfinished? Have these people somehow not heard of shapeshifting? What is the Enterprise’s porn collection like? Does it actually have one? It’s the book that will at least have no trouble qualifying for the HOV lane.