> TOS > EPISODES
> FOR THE WORLD IS HOLLOW
At the same time McCoy discovers that he has a year to live, the
U.S.S. Enterprise encounters the asteroid Yonada which is
determined to be artificially propelled. Its center is occupied by
humanoids, whose ancestors built the asteroid "vessel" in an effort to
escape the destruction of their solar system. However, the controls have
become defective and Yonada is heading for collision with a
The people are ruled by Natira, a priestess who takes her orders from
the central computer. While Kirk and Spock search for the central
controls that will redirect the ship, McCoy and Natira fall in love.
Kirk and Spock return to the U.S.S. Enterprise but McCoy, wishing
to spend what little time he has left with the woman he's come to love,
stays behind, marries Natira and accepts the "Instrument of Obedience"
which punishes wrong thinking.
Soon after the marriage, McCoy calls Kirk, telling him that he may have
found the controls for the asteroid. However, he is struck down by the
"Instrument of Obedience" before he can tell them where. Kirk and Spock
beam back to Yonada, remove the sensor from McCoy, and locate the
controls. They manage to put Yonada back on course. In
deciphering the computer's library, Spock finds a cure for McCoy's
disease, and the doctor returns to the U.S.S. Enterprise. Natira
must stay on Yonada to guide her people and so bids McCoy