Episode Title: "WHAT ARE LITTLE GIRLS MADE OF?"
Production Number: 10
Original Air Date: 10-20-66
Synopsis: The U.S.S. Enterprise arrives at planet Exo-III to search for Dr. Roger Korby, who has been out of contact for five years. Captain Kirk beams down to the planet's underground ruins with Nurse Christine Chapel, who was engaged to Korby before his disappearance.
They learn that an android called Ruk, who was left by the "old ones" centuries ago to tend the machinery, is working with Korby, and that members of Korby's staff are also androids, created with technology Korby found on the planet. Korby refuses to let Kirk and Chapel return to the Enterprise until he has had a chance to explain the importance of his discovery.
Korby creates an android duplicate of Kirk, and plans to use the Enterprise to travel to other planets and secretly create more androids, who can be programmed without unpredictable emotions, ending war and suffering in the Galaxy. But the real Kirk makes Ruk remember how the androids on the planet destroyed their creators, the "old ones," because they were inconsistent and unpredictable. Kirk convinces Ruk that Korby is also a danger to the planet's order, and Korby is forced to destroy Ruk. When Kirk and Korby struggle over a phaser, Korby's hand is damaged and Kirk and Chapel learn he is an android. He was duplicated years ago with the planet's technology when the real Korby was frozen and near death. When the Korby android learns that his dream of perfection is not possible, he destroys himself and the last other remaining android.
With her fiancé dead, Nurse Chapel decides to continue serving aboard the Enterprise.
Factoid: Nurse Christine Chapel gave up a career in bio-research to sign aboard a starship.
Factoid: Planet Exo-III has gravity that is 1.1 of Earth, but the surface temperature is 100 degrees below zero. The planet's sun has been fading steadily for a half-million years.
Factoid: Dr. Roger Korby is often called the Pasteur of archaeological medicine. His translation of medical records from the Orion ruins revolutionized immunization techniques.
Factoid: George Samuel Kirk is Captain Kirk's brother. Only Captain Kirk calls him "Sam." Captain Kirk's brother saw him off on his current mission, with his wife and three sons. He said he was continuing his research and wanted to be transferred to the Earth Colony Two research station.
Guest Characters: Nurse Christine Chapel