- For other uses, see Spock.
In that year, an android duplicate of Captain James T. Kirk of the USS Enterprise replaced his counterpart on Tranquility VII and took command of the ship. The Kirk android found that he had the desire to use the phrase "Mind your own business, Mr. Spock! I'm sick of your half-breed interference, do you hear?" whenever the ship's first officer questioned his actions. It intensified as time passed but he was nevertheless able to resist it. The Kirk android regarded replacing Spock as vital to the success of the android revolution as he believed that the science officer would otherwise be a formidable opponent.
The Kirk android ordered the Enterprise to Minos V on the pretext of searching for missing colonists. In the process, the search parties - including Spock, Lieutenant Hikaru Sulu, Ensign Pavel Chekov and Nurse Christine Chapel - were captured and replaced with androids.
The original Kirk was able to escape Tranquility VII and made his way to the USS Hood, which had been taken over by the androids. He and a group of the surviving Human officers were able to destroy the androids and retake the ship. After getting a full list of the replaced Enterprise crewmembers from Lieutenant Nyota Uhura, Kirk beamed over to the ship and gathered Montgomery Scott and the rest of the engineering crew to retake the ship. The android versions of Kirk, Spock and the others attempted to escape but Kirk was able to track them to the shuttlebay and trick them into destroying a shuttlecraft. The resulting explosion destroyed the androids. The Enterprise then returned to Minos V and Kirk rescued the original versions of Spock, Sulu, Chekov, Chapel and his other crewmates. (TOS novel: Double, Double)