Kirk and McCoy accompany Spock to the Vulcan Academy Hospital seeking experimental treatment for a badly wounded Enterprise crew member. Spock's mother is also a patient in the hospital, and Kirk soon becomes involved in the complex drama of Spock's family. Suddenly, patients are dying, and Kirk suspects the unthinkable - murder on Vulcan! But can he convince the Vulcans that something as illogical as murder is possible?
Unexplained gravitational disturbances summon Captain Picard and the Starship Enterprise to the planet Elysia and Data to a date with destiny. For on this alien world, he is drawn into an impossible quest, leading him to consequences both heartwarming and disastrous, as he finally dares to pursue his fondest desire: to become human.
Infinite Diversity in Infinite Combination is more than just a simple credo, for those of the planet Vulcan it is the cornerstone of their philosophy. Now, on the Vulcan Science Colony Nisus, that credo of tolerance is being being put to its sternest test when a deadly plague, whose origins are somehow rooted in the concept of I.D.I.C. itself, threatens to tear down that centuries-old maxim.