Of all the experiences shared by Captain Kirk and the crew of the Starship Enterprise during their first five-year mission, two were among the most perilous: a journey to the nonphysical realm of Transition where the massive computer known as Memory Prime was situated, and the nightmarish mission to Talin IV, a world poised on the brink of destruction that Kirk was forbidden to save. In the twenty-third century, a hundred years before a sentient artificial...