It is my opinion that someone should reduce their assumptions about something to the absolute minimum possible. The purpose of avoiding assumptions is to avoid assuming so much that it becomes contraditory and inconistent and there is no possible way to make it all self consistent.
As some of you may be aware, I have expressed the opinion that in a long running radio, television etc. series that lasts for several seasons, and has tens or hundreds or soemtimes thousands of episodes, it makes sense to think of each of the episodes as happening its own separate alternate universe different from the alternate universes of other episodes.
If the series has a pilot showing how the characters come together in their setting, one can assume that each of the episodes happens is a sequal to that pilot film (but the episodes otherwise happen in alternate universes of their own). I guess that "Encounter at Farpoint" is that time of pilot for TNG. I am not certain whether "Where No Man Has Gone Before" is such a pilot film for TOS.
And if one episode of a series is a sequel to another episode, they must both happen in the same alternate universe.
And in some threads I have listed the few TOS episodes which seem to be sequels to other TOS episodes.
It is my opinion that all the episodes of TNG, DS9, and VOY are sequels to "Encounter at Farpoint", though they mostly happen in alternate universes to each other. So if any episode of TNG, DS9, and VOY is a sequel to any episode of TOS, Encounter at Farpoint" must also be a sequel to that episode of TOS, which in turn means that every episode of TNG, DS9, and VOY must also be a sequel to that episode of TOS.
And in other threads I have listed the episodes of TOS, and the TOS movies, that every episode of TNG, DS9, and VOY must also be a sequel to. They are about a dozen episodes and movies. In the VOY episode "Q2" there are mentions of other events during Kirk's five year mission:
ICHEB: Though it was a blatant violation of the Prime Directive, Kirk saved the Pelosians from extinction, just as he had the Baezians and the Chenari many years earlier. Finally, in the year 2270, Kirk completed his historic five year mission and one of the greatest chapters in Starfleet history came to a close. A new chapter began when Kirk regained command of the Enterprise.
And there is no reason to assume that many morre exicting events happened durin KIrk's five year mission than are mentioned above.
And since this thread is about TOS, we Don't have to consider the many times more complicated question of which TNG, DS0, and VOY episodes were sequels to others.
Accepting the possibiity that unless there is evidence otherwise, TOS episodes might happen in their own separate alternatie universes gives a method of avoiding problems with episodes contradicting other episodes and too many episodes happening in five years time, and the Enterprise travelling too far in five years time.
Furthermore, there is no need to assume that you know the order that TOS episodes happen in. It is normal to assume that the three seasons of TOS happen one after the other, and that that TAS happens after TOS. And it is often assumed that all episodes happen in stardate order, or that all episodes happen in production order, or that all episodes happen in broadcast order.
And there is no proof that episodes, whetther in the same elternate universe, or in different alternate universes, happen in any particular order someone can think of and assume. If episode B is a sequel to episode A, episode A must happen before episode B. And that gives less than a dozen cases of episodes happening in a known order.
Kirk talks about the five year mission in the opening credits of TOS. And in
Star Trek: The Motion Picture:
KIRK: I'm replacing you as Captain of the Enterprise. You'll stay on as Executive Officer. Temporary grade reduction to Commander.
DECKER: You personally, are assuming command?
KIRK: Yeah.
DECKER: May I ask? Why?
KIRK: My experience, five years out there dealing with unknowns like this, my familiarity with the Enterprise, this crew.
So the question is how long or short a period would Kirk describe as "five years". Possibly Kirk would only describe a time span as "five years" if it was between five and six years. Possibly Kirk would only describe a time span as "five years" if it was between four and a half and six and a half years. Possibly Kirk would only describe a time span as "five years" if it was between four and seven years.
And I think that four to seven years is the limit of leeway we can give to Kirk's "five years", which is usually assumed, without proof, to be the exact same span of time as the five years mission, though perhaps those two time spans merely overlapped to a degree.
With the possible exception "Where No Man Has Gone Before", which might have been before the five year mission, the maximum possible amount of time between any two episodes during the five year mission should not be more than seven years, and possilby much less. And if you decide that episodes don't have to happen in any particular predetermined order, that might help with some chronological problems.
I suggest that there may be one or more time skips in TOS, where the Enterprise travels forward in time and can't travel back to its original time for fear of changing the timeline. Such time skips might possibly explain why the interstellar society seems much more advanced in the later seasons than in the first half of the first season. So the fiv eyears mission could have been spread out over more than five years time on Earth.
Limits to such hypothetical time skips are episodes where the lengths of time between meeting characters previusly iare mentoned, in "Court Martial", "This Side of Paradise", "Journey to Babel" and "The Deadly Years".
Limits to the possible duration of such hypothetical time skips may also be set by the TOS movies from WOK to FF, movies which should all happen within a short period of a few months of fictional time.
In WOK both Kirk and Khan say it has been fifteen years since they last met, which is usually assumed to have been during "Space Seed". And I would guess that "fifteen years" could not possibley be less than fourteen years or more than seventeen years. .
In FF it is said that Nimbus III was established by the Federation, the Romulans, and the Klingons "twenty years" earlier. Twenty years should not be less than eighteen or more than twentytwo, But everyone should have known what Romulans looked like after Romulan subject species cme to Nimbus III and told others. So Nimbus III should have been founded some time after "Balance of Terror",when nobody in the Federation kenw what Romulans looked like.
"Balance of Terror" is usually supposed to have been only months before "Space Seed", which would be fourteen to seventeen years before WOK, which would be a few months before FF, which should be eighteen to twenty two years after "Balance of Terror". So there are problems making the chronlogy add up. Making "Balance of Terror" happen years before "Space Seed" would help.
If the Enterprise A encountered some sort of time warp on its shakedown cruise at the end of VH, and was sent a few years into the future to just before FF, that would help the chronological problems.
There is no proof that TMP happens in the same timeline as WOK, so it is possible that the two movies happen at the same time in different alternate universes. The only evidence for the time interval between the end of the five year mission and TMP are the statements that Kirk has not logged a star hours for two and a half years, and that Kirk has been chief of Starfleet Operations for two and a half years. But both of those could refer to a time that was itself some unknown time, perhaps years, after the end of the five year mission.
It is common to assume that everyone alwyas states time intervals using years of the same lenght. And it is common to assume that those years of the same length are Earth years. And there is no proof of that.
In "Journey to Babel" Sarek seems to give his age in Earth years.
SAREK: One hundred two point four three seven precisely, Doctor, measured in your years. I had other concerns.
And there may be a few examples of Earth years being specified. But most statements do not specify the type of years used, and there are some examples where characters using years of diferent lengths could explain chronolgical contradtictions.
There are many examples in
Star Trek productions where events are dated to a year number.
It is common to assume that all such examples count the years from the same moment in time used as a calendar era. It is also common to assume that the calendar era used in all such examples is
Anno Domini.
But I know of only about half a dozen examples where the calendar era, the time that the years are counted from, is specified. There is one example of a year BC, in TOS, and the rest are examples of years AD in tNG.
So accepting the possibility that different dates might be given using different calendar eras may be necessary to explain various chronological contradticitons in TOS.
And I hope this discussion will help people avoid making too man assumptions about TOS.