Continued from post number 160. Compilation of all evidence of the passage of time in TOS, to find limits on how much of a time skip there could have been between the first part of season one of TOS and the rest of TOS. In Star Trek II:The Wrath of Khan Khan says: So any time jumps which Kirk and the Enterprise might have made between "Space Seed" and Star Trek II:The Wrath of Khan must total less than the total time Khan experienced between "Space Seed" and Star Trek II:The Wrath of Khan , which should be less than 16.0 years. Kirk also said it was 15 years since he last saw Khan. In "Journey to Babel" Spock's joining Starfleet resulted in Spock and Sarek not speaking as father and son for 18 years. So "Journey to Babel" should be either 18 years after Spock entered Starfleet academy or 18 years after Spock graduated and was commissioned an ensign in Starfleet. "Journey to Babel" was probably some time after "The Menagerie". "The Menagerie" was 13 years after the Talos IV incident, when Spock was apparently senior enough to be third in command of the Enterprise. If it took Spock 4 years to graduate, and he entered 18 years before "Journey to Babel". Spock should have graduated and become commissioned only one year or less before the Talos IV incident. If Spock graduated 18 years before "Journey to Babel", he should have been commissioned only five years or less before the Talos IV incident. In "The Enterprise Incident" in the 3rd season: If 18 years refers to the same event in Spock's life in both "Journey to Babel" and "The Enterprise Incident" the two episodes would happen less than one year apart. If "Journey to Babel" was 18 years after Spock entered Starfleet Academy and "The Enterprise Incident" was 18 years after Spock graduated and was commissioned, they might be as much as 4 years apart. But that would give Spock only 1 year of seniority at the most between being commissioned and being 3rd in command at Talos IV, unless the precocious Spock graduated from the Academy and was commissioned in only one year or something. Or possibly Spock subtracted several years spent in some sort of time warp or something from the total time since he was commissioned when he said he had been a starfleet officer for 18 years. In the 3rd season episode "The Day of the Dove", which perhaps helpfully has no stardate, Kang says: This implies that "The Day of the Dove" is about 3 years after "Errand of Mercy", which should be no more than one or two more years than would be expected. In the second season episode "Who Mourns for Adonais?": Being 22 indicates that Ensign Chekov probably hasn't been on the Enterprise very long. But in Star Trek II:The Wrath of Khan Chekov and Khan apparently recognized each other from the first season episode "Space Seed", indicating that "Who Mourns for Adonais?" probably didn't happen more than a few months after "Space Seed". Of course "Space seed" would be expected to be after the hypothetical time skip if that happened. In the 2nd season episode "The Deadly Years" Kirk meets an old girffriend Dr. Janet Wallace: Those 6 years, 4 months and some days may have been since sometime before Kirk became captain of the Enterprise but was already married to his Starfleet career. Or they might possibly have been since sometime after Kirk already had the Enterprise, perhaps even sometime during the first seasons. But neither mentions Kirk being stuck in a time warp or something as an excuse for not contacting her more often. In "This Side of Paradise" in the second part of the first season, on planet Omicron Ceti III: If Lelia met Spock on Earth sometime before the first season of TOS, any time skip between the first and second parts of the first season would have to have been less than six years long. In "Court Martial" Kirk meets his former girlfriend Areel Shaw: If Kirk and Shaw last met sometime before the first season of TOS, any time skip between the first and second parts of the first season would have to have been less than 4 years and 7 months long. In "Amok Time": KIRK: I'm more interested in your request for shore leave. In all the years SPOCK: You have my request, Captain. Will you grant it or not? KIRK: In all the years that I've known you, you've never asked for a leave of any sort. In fact, you've refused them. Why now? I think that Kirk and Spock would have to be serving together on the same base or vessel for Kirk to keep track of whether Spock was taking leave. And kirk's awareness of Spock's doings goes back at least two years and possibly more. So possibly this indicates that Kirk has been working closely with Spock, on the Enterprise perhaps, for at least two years of time that they experienced, as opposed to time in the outside universe. In "Journey to Babel": Together these quotes seem to indicate that the close association of Kirk and Spock (and thus perhaps Krk being in command of the Enterprise) has lasted for at least two years but no more than at most five years by the second season of TOS. And if there was a time skip sometime during the first season of TOS, it would seem to have been no longer than five or fewer years minus two or more years, and thus three years or less. Unless of course Amanda didn't think it was fair to blame Spock for not visiting when he was stuck in a time warp or something, and so deduced the period of the time skip from the total time since the last visit to get the four years she said that Spock hand't visited them in. Still, a time skip of one, two, or three years while the Enterprise was stuck in a time warp or something else science fictional would help to explain the changes between the first and second parts of the first season. So maybe the Enterprise was transported a few years, and only a few years, into the future between the first and second parts of the first season, and was more or less stuck there, making the changes seem more abrupt than they would be if the viewers had seen the changes happening as they occurred. If there had been an episode when Earth joined the Federation, or rejoined it, or when the Federation adopted a more centralized form of government - the way the USA replaced the Articles of Conferation with the US constitution - the changes in the setting of TOS would not have seemed so great. But if the Enterprise was stuck in a time warp or something off screen when those changes happened there would be no way for the show to show those changes. To be continued.