Question: When the Enterprise is in orbit, it uses the Impulse engines to maintain orbit. The Impulse engines are located on the back (aft) of the primary saucer. Why were these not on or lit up? Unless they're using gravity, but there are the familiar engine sounds.
Question: Did actor Robert Lansing ever make any comments on Star Trek in general or "Assignment: Earth" (TOS S2E26) in particular? His co-star in this episode/pilot, Teri Garr, had a sour, cynical and dismissive opinion of "Assignment: Earth" and Star Trek fandom (Starlog #173). But what was Robert Lansing's feeling about his experience on Star Trek? Did he like it, hate it, was he excited about the prospect of entering into the new "Gary Seven" series; or, like Teri Garr, was Lansing glad to put it behind him? I've never seen or heard anything about Lansing's personal views on the show.
Question: Dr. McCoy stays on the planet Yonada as one of Yonada's people, but doesn't change his Starfleet uniform to what the people of Yonada are wearing. Why not? He chose to stay and no longer wanted to be on the Enterprise.
Question: Has it been overlooked that in this episode Spock seems to intuitively know that the sword Sulu is wielding is of the 16th (or 17th) century? It is made clear that Sulu is chasing crewmen with 'a sword' but the type of sword and the manner in which Sulu challenges the men, is not known. Later Spock gives an 'overview' of what is happening on the ship describing Sulu as a 16th (or 17th) century swashbuckler - but the bridge crew had no prior knowledge of what sword Sulu was using or how he was speaking... Was that just one of Spock's "best guesses"?
Question: It's generally accepted that Warp Drive makes a bubble of space around the vessel and accelerates the outer bubble around the space surrounding the ship. Given the nature of the warp drive enveloping a pocket of space, can the warp drive be used offensively to capture part of another vessel in the space surrounding the Enterprise and use the acceleration to tear the enemy ship apart?
Question: Why don't any of the Treks to come use any of the useful things that Enterprise discovers? A psychotricorder can record your memories! Scalosian water speeds up humanoids to the point they can dodge energy beams! A veinful of kironide makes you a powerful telekinetic a few minutes after injection! If Picard, Sisko and Janeway had just read Kirk's logs, the Borg and Dominion wouldn't have had a chance.
Question: How in the world did Hikaru Sulu, whom under all circumstances is Japanese, end up with that last name? Even in the novelization of the Star Trek IV, he meets his great (great.) grandfather named Akira Sulu. (Question is aimed more for a production explanation than a story-based one.)
Question: Does anyone have an idea how the Klingons - quite human-looking in the original series - have got their forehead furrows for which they are now famous (and easily recognizable)? I've heard rumors so far that the whole issue would be explained in the current 'Enterprise' series, but so far I haven't caught the clue.
Question: In this episode, the navigator, Mr. Bailey, has an earpiece only for the length of time it takes to notify the crew of the message coming in over the navigation beam. Why is it that no time before, or since, that anyone at the conn or navigation positions never had one?