Stardate: 3372.7 --Spock is unusually restless and ill-tempered. After he throws a bowl of soup at Nurse Chapel, Kirk insists on an answer and Spock reveals that he is in the early stages of Pon Farr, the Vulcan time of mating that occurs once every seven years. He must return to Vulcan to mate or he will die. Kirk goes against Starfleet and heads toward his friend's home planet of Vulcan.The the ritual mating doesn't go as planned.

original airdate--September 15, 1967  Remastered date--January 12, 2008

music:Theme song  written by Alexander Courage

Goof-- In the introduction, Spock requests a leave of absence on Vulcan, with a loss of only 2.8 light-days. In this context, he is using light-days as a measurement of time. It is, however, a unit of distance - 25,920,000,000 kilometers.

Trivia--Vulcans were named for Gene Roddenberry's concept for their planet (in the constellation Eridanni) being a "volcanic", desert world.

Space: the final frontier. These are the voyages of the starship Enterprise. Its five-year mission: to explore strange new worlds, to seek out new life and new civilizations, to boldly go where no man has gone before.