The original series .
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.
You will find that Kirk, Spock, and the Klingons appear in various Star Trek movies. An example will be: Star Trek: The Undiscovered Country.
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.
In the Original Series, the CO (commanding officer) is the captain of the ship, Captain James T. Kirk. However, Spock is of the rank commander, if that's what you were asking.
Spock and Dr. Leonard McCoy listened to the last taped orders of Captain Kirk in Star Trek The Original Series episode "The Tholian Web".
The characters' names are Kirk and Spock. And, the series is called: Star Trek The Original Series. Or ST-TOS for short.
If you mean commanding officer as in James T. Kirk's superior, it would have been Captain Christopher Pike. If you mean Kirk's second in command (first officer), it would have been Spock.In the 2009 movie Star Trek, Captain Christopher Pike made Spock acting captain and James T. Kirk the acting first officer before he (Pike) was taken captive by the Romulans. Later in the film, Kirk provokes Spock to attack him, which soon after Spock is forced to relinquish his command due to being emotionally compromised. Kirk then assumes the role of captain, and Spock becomes his first officer.In the sequel Star Trek Into Darkness, Kirk is demoted for violating the Prime Directive and (now Admiral) Pike becomes commanding officer of the USS Enterprise. He then takes in Kirk and makes him first officer. Kirk later regains the role of captain after Admiral Pike was assassinated.
James T. Kirk
1) spock 2) captain kirk 3) enterprise 4) outer space 5) klingons 6) phasers
Fisrt off, The series is Star Trek. The half Vulcan half Human is Science Officer Spock.
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.
James T. Kirk