The Corbomite Maneuver.
Well, that would be a bit of a spoiler. But Spock is loyal (ugh, emotion) to his friend and Kirk. So, even though Spock and Sybok are half brothers Spock remains loyal to the Captain.
no spock is the first officer of Enterprise. Captain Kirk is the leader. So if Kirk is away or dead then Spock takes over. This is if you are referring to the original series.
Spock's half brother is called Sybok.
In the episode "Amok Time", McCoy fakes Kirk's death by injecting him with a drug before he goes into combat with Spock. In the movie Star Trek: Generations, Kirk dies twice: saving the Enterprise from the approaching Nexus, and again helping Picard stop Soren from obliterating a star.
The Kobayashi Maru. Spock created it to test how Cadet's would respond to a no-win scenario.
Evil Spock and Evil Kirk . . . . . . . . Actually it was Spock, and just Spock (not Kirk), but in the alternate universe in the episode, Mirror, Mirror, so this alternate Spock (goatee, and all) has become known as "Evil Spock"; and, actually, (Evil) Spock said: "Terror must be maintained, or The Empire is doomed. It is the logic of history."
For the majority of the movie, Kirk addresses him simply as "Spock". Later, after Kirk has been promoted to Captain, he begins referring to him as "Mr. Spock."
Spock
Well, that would be a bit of a spoiler. But Spock is loyal (ugh, emotion) to his friend and Kirk. So, even though Spock and Sybok are half brothers Spock remains loyal to the Captain.
Spock
Much better, actually. In the episode "Operation Annihilate" Spock is temporally blinded. After his eyesight returned and Spock is once more the bridge, McCoy whispers to Kirk, "Don't let Spock know that I said he was the best damned first officer in the fleet." To which Spock turns from his station and says, "Thank you, Doctor." Then Kirk says, "You were so concerned about his Vulcan eyes, you forgot about his Vulcan ears".
Spock and Dr. Leonard McCoy listened to the last taped orders of Captain Kirk in Star Trek The Original Series episode "The Tholian Web".
no spock is the first officer of Enterprise. Captain Kirk is the leader. So if Kirk is away or dead then Spock takes over. This is if you are referring to the original series.
Spock's half brother is called Sybok.
You will find that Kirk, Spock, and the Klingons appear in various Star Trek movies. An example will be: Star Trek: The Undiscovered Country.
In "The Original Series" Mr. Spock was already onboard as the Science Officer; both the Pilot episode, and the released series. In the latest movie, Kirk met Spock when he 'cheated' at the "Kobayashi Maru" test, or at the trial quickly following it.
If he likes Kirk or Sulu better.