Star Trek: The Original Series - Volume 33
For The World Is Hollow And I Have Touched The Sky: (Episode 65)
The U.S.S. Enterprise? discovers planet Yonada is on a collision course with an asteroid and Kirk, Spock and McCoy beam down to warn the Yonadans. But unknown to these people, their "planet" is actually a spaceship sent by their ancestors to colonize a new planet. The ship is controlled by the Oracle, an unrelenting computer, and all will die if Kirk and the others are unable to free the planet-ship from the Oracle's control!
Day Of The Dove: (Episode 66)
The U.S.S. Enterprise? receives a distress signal from a Federation colony, but instead of survivors Kirk and crew find a disabled Klingon ship. Kang, the Klingon commander, is convinced the U.S.S. Enterprise? attacked his vessel, while Kirk blames the Klingons for destroying the colony. Aboard the U.S.S. Enterprise?, Klingons take on Kirk's crew. Both sides are kept evenly matched and even fatal wounds heal instantly! Who or what is controlling them, and why?