<P> McCoy marries Natira, and an instrument of obedience is implanted in his temple . Natira shows him their sacred text, the "Book of the People". McCoy suspects it holds the key to setting Yonada back on course, and calls the Enterprise to share this information, which causes his obedience device to be activated . Kirk and Spock transport back to Yonada, and Spock removes the device from McCoy while Kirk tries to explain the truth to Natira . When Natira's own device is activated, McCoy removes it while Kirk and Spock again deal with the Oracle . Spock learns from the Book how to enter the control room behind the Oracle's altar, where they discover the ship's navigational controls and correct Yonada's course . Spock also discovers the Fabrini archives, which contain a cure for McCoy's condition . McCoy returns to the Enterprise where he is successfully treated, hoping to see Natira again when Yonada arrives at its new homeworld in about a year . </P> <P> Zack Handlen of The A.V. Club gave the episode an' B -' rating, describing it as having potential, but being hampered by a script that fails to act on that: "we have Kirk and Spock unraveling the mystery by the halfway mark, and then spending the rest of the episode on clean - up duty . You know McCoy is coming back, you know he'll be cured, and you know that the computer will be defeated . About the only question is whether or not Natira will make it to the end credits, and happily, she does--which means McCoy, unlike Kirk, isn't a widower ." </P> <P> Star Trek novelist Dayton Ward wrote, </P> <P> "For the World is Hollow and I Have Touched the Sky" is a decent idea, in and of itself . The idea of a generational ship encased in an asteroid is well worth exploring . After all, variations on the concept were already a staple of science fiction long before Star Trek came along . My biggest problem is why someone--the Fabrini--felt it necessary to conceal the truth behind the "worldship" from its population . Wouldn't it make more sense for the generations of Yonadans to be informed as to their purpose, and be working and training the next generation (s) to be ready for when the ship arrives at its destination? Instead, they're wandering the halls, apparently doing little more than tossing Frisbees and getting the occasional spanking from the Oracle...The episode is typical of the third season: Long on talk, light on action, adequate yet hardly spectacular in execution . </P>

Katherine woodville star trek for the world is hollow and i have touched the sky cast