In answering a medical emergency at an archaeological expedition, Kirk confronts the deep hatred of an old love, Janice Lester, who supposedly lies severely ill from celebium radiation. In payment for jilting her back at Starfleet Academy, Dr. Lester arranges for an alien machine to swap her consciousness with that of the captain and takes command of the Enterprise. Once aboard, Kirk (in Lester's body) tries to convince Spock that he is trapped in her body. As a result, Janice (in Kirk's body) conducts a court-marshal with the intent of executing Spock and Kirk (in Janice's body), and later McCoy and Scott, to keep her secret. The crew realize something is seriously wrong with their captain and, not wishing to incur an illegal death-penalty themselves, begin a passive resistance. Written by
Did You Know?
According to Harry Landers
, he was very fatigued during this episode because he had just had his upper right lung removed due to an infection. He wanted to turn the role down but did it as a favor to producer Fred Freiberger
. See more
Kirk, in Lester's body, could make any number of references to the crew that Janice Lester would not know - for example, saying "Roger Korby" to Nurse Chapel. See more
Dr. Janice Lester
[in Kirk's body
Attention all personnel: First Officer Spock has been placed under arrest. He has conspired with Dr. Lester to take over the ship from your captain. A hearing will be immediately convened to consider the charges and specifications of a general court martial on the charge of mutiny.