Episode Title: "WINK OF AN EYE"
Production Number: 68
Original Air Date: 11-29-68
Stardates: 5710.5, 5710.9
While exploring an outer quadrant of the Galaxy, the U.S.S. Enterprise answers a distress call from a city on the planet Scalos; Captain Kirk leads a landing party to the planet, but there are no visible inhabitants in the city, and one member of the landing party vanishes from sight after drinking some water on the planet.
After beaming up to the ship, Captain Kirk's coffee is infected with Scalosian water, and he is shifted to the same level as the hyper-accelerated Scalosians, who have secretly boarded the ship, moving faster than humans can see. The accelerated Captain Kirk learns that the Scalosians' home was polluted long ago by volcanic eruptions and radiation, and they became sterile in their accelerated state, so they needed to mate with aliens they could lure to the planet and accelerate to their level.
Commander Spock and Dr. McCoy develop an antidote to the Scalosian water, and Spock accelerates himself to help Kirk drive the Scalosians off the ship; Spock repairs all the damage the Scalosians caused to the Enterprise in the wink of an eye, before using the antidote to return to normal time.
Factoid: People accelerated by Scalosian water age rapidly and die if their cells are damaged.
Guest Characters: Nurse Christine Chapel
Alien Races: *Scalosians
KEY: [brackets]=illusions *star=first appearance