Somebody else's subthread got me starting to think: where were all the aliens in the Enterprise crew during TOS? To my memory, Spock was the only one we ever saw. (The only exception was a Vulcan, assisting Spock in the Mirror Enterprise. But that doesn't "really" count.)
Especially odd considering that in TMP, which takes place just a few years later after the end of the five-year mission, there are aliens all over the place in the crowd scenes (including one alien with a speaking line on the bridge.)
So during those few years, did StarFleet have a major diversity initiative? Or was it just another case of "retconning Chekov into Space Seed" by saying the aliens really were there, but we just never saw them?
Especially odd considering that in TMP, which takes place just a few years later after the end of the five-year mission, there are aliens all over the place in the crowd scenes (including one alien with a speaking line on the bridge.)
So during those few years, did StarFleet have a major diversity initiative? Or was it just another case of "retconning Chekov into Space Seed" by saying the aliens really were there, but we just never saw them?