"Jim, when I suggested to Spock that it was time for his check-up, your logical, unemotional first officer turned to me and said, "You will cease to pry into my personal matters, Doctor, or I shall certainly break your neck.""
"Amok Time" is the first episode of season two of the science fiction television series Star Trek. It is the 30th aired episode of the series and first aired on Friday evening on NBC on September 15th, 1967. Like all episodes from the series, "Amok Time" was digitally remastered with upgraded visual effects. This version first aired on February 17th, 2007. In this episode, Mister Spock begins demonstrating erratic, even violent behavior, uncharacteristic of his traditional, stoic and logical demeanor. Unless the crew of the Enterprise takes him back to his home world of Vulcan to undergo the ritual of Pon Farr, Spock may die.
First appearance of the Vulcans. Although the character of Spock has appeared in every episode of the series, he is only half-Vulcan. The character of T'Pring is the first full Vulcan character ever presented on Star Trek.
Spock: Captain, there is a thing that happens to Vulcans at this time. Almost an insanity, which you would no doubt find distasteful.
Spock: The birds and the bees are not Vulcans, Captain. If they were... if any creature as proudly logical as us...were to have their logic ripped from them...as this time does to us. How do Vulcans choose their mates? Haven't you wondered?
Spock: After a time, you may find that "having" is not so pleasing a thing, after all, as 'wanting.' It is not logical, but it is often true.