How about the Klingon/Romulan culture shift between TOS and TNG (or maybe the movies)? When the Romulans first appeared, they seemed to have more of a sense of honor, and the Klingons were the sneaky, skulking villains. By the time of TNG, Klingons’ highest priority was honor, and it was the Romulans who were up to sneaky skulduggery.
I think that one is OK. Reese originally states that the time displacement equipment depends on the energy field generated by a living organism. When the T-1000 comes through, it’s already in a human form, so whatever the mimetic poly alloy does to perfectly mimic human flesh can also generate the required energy fields.
Besides, Reese may have been describing it inaccurately. He didn’t build the fucking thing.
Yes, it’s definitely only the Elder Wand in the books, but somehow the Elder Wand keeps track of who its master is regardless of who is actually using it. Draco defeated Dumbledore, the wand was buried with him, but Voldemort stole it from his grave. From then on, V. is using it, but it doesn’t work well for him.
In book 7, Harry’s wand is broken. Later he defeats Malfoy using Hermione’s wand, and takes Draco’s wand. That’s the wand he uses for the rest of the book, but he also notes it doesn’t work well for him, so it hasn’t transferred its allegiance to Harry. But the Elder Wand knows that Harry has defeated Malfoy, so it has translated its loyalty to him, even though he’s never used it.
John Wick 1: Oh, she’s willing to break the rules of the Continental? Give her a couple extra million. Oh hey, despite you breaking the rules, you clearly aren’t panicking or running. In fact, we want to set up a meeting with the Continental management that’s in no way suspicious and you probably won’t die there
John Wick 2: Oh, you broke the rules of the Continental? That’s really bad. Probably not worth a measly million or two. You’d be dead now except I’ll give you a headstart. Certainly you shouldn’t be walking around nonchalantly like nothing happened. Why do people even bother?
Some confusion between Klingons and Romulans started in the movies, particularly movies 2 and 3. At the beginning of Wrath of Khan, in the famous Kobayashi Maru test, the Enterprise goes to rescue a ship which has accidently strayed into the “Klingon neutral zone.”
In Star Trek III: The Search for Spock, the Klingon commander played by Christopher Lloyd is operating from a Klingon Bird of Prey, which is equipped with a cloaking device.
Long-time fans will remember that in the original series, it was the Romulans who had a neutral zone, whose ships were painted like birds of prey, and who had a cloaking device. Suddenly all of these distinctly Romulan things were given to the Klingons, for no apparent reason.
Plus, he “don’t know tech stuff.”
(Your explanation is quite good; I’m satisfied. Still, flesh covered buckets…) 
Nope - we’ve been rereading them to our 7 year old lately, so this is pretty fresh in my mind. Remember that Voldemort captured Olivander to specifically interrogate him about this bit of lost wand lore. I’m f it applied to all wands, everyone would know about it.
I don’t think it is explicitly stated that it points to Isla de la Muerta, though it does for Jack, who wants either the Black Pearl (which is located there) or revenge against Barbossa, who is also there. We see him using the compass at the end of that first movie, which indicates that he is using it to get somewhere else, since he has no need to go to Isla de la Muerta at the end.
//i\\
Blockchain
The first time we meet the Weeping Angels on Doctor Who, the rule is to always watch them; they only move when they’re not being watched.
The second time they added that any photograph or video of a Weeping Angel becomes one itself, and that you cannot look an Angel in the eyes or you’ll become one. Which, I feel, is just overkill.
JKR:
JKR: I am going to put up another update on my website about this, and I have one half-written. Essentially, I see wands as being quasi-sentient, you know? I think they awaken to a kind of-- They’re not exactly animate but they’re close to it. As close to it as you can get in an object because they carry so much magic. So that’s really the key point about a wand. Now, the reactions will vary from wand to wand. The Elder Wand is simply the most dispassionate and ruthless of wands in that it will only take into consideration strength. So one would expect a certain amount of loyalty from one’s wand. So even if you were disarmed while carrying it, even if you lost a fight while carrying it, it has developed an affinity with you that it will not give up easily. If, however, a wand is won, properly won in an adult duel, then a wand may switch allegiance, and it will certainly work better even if it hasn’t fully switched allegiance for the person who won it. So that of course is what happens when Harry takes Draco’s wand from him, and that’s what happens when-- But you know what I mean. Oh, yeah, Ron. The blackthorn wand from the snatcher. So that would be sort of rough and ready, common, or garden, a wand favoring the person who had the skill to take it. It would favor them. However, the Elder Wand knows no loyalty except to strength. So it’s completely unsentimental. It will only go where the power is. So if you win, then you’ve won the wand. So you don’t need to kill with it. But, as is pointed out in the books, not least by Dumbledore because it is a wand of such immense power, almost inevitably, it attracts wizards who are prepared to kill and who will kill. And also it attracts wizards like Voldemort who confuse being prepared to murder with strength.
http://www.accio-quote.org/articles/2007/1224-pottercast-anelli.html
I guess when you boil it down, that’s what she wrote from the beginning - “the wand chooses the wizard”.
But man - we could fill this thread with things JKR has gone back and retroactively added or shoehorned into her world.
Hmm, it seems Ollivander said much the same in Deathly Hallows, I guess I got it wrong above. It’s on page 494 of the hardcover edition, Harry, Ron & Hermione speaking to Ollivander:
“I took this wand from Draco Malfoy by force,” said Harry. “Can I use it safely?”
“I think so. Subtle laws govern wand ownership, but the conquered wand will usually bend its will to its new master.”
“So should I use this one?” said Ron (referring to Wormtail’s wand)
“(Ollivander describes wand) Yes, if you won it, it is more likely to do your bidding, and do it well, than another wand.”
“And this holds true for all wands, does it?” asked Harry.
“I think so,” replied Ollivander. “You ask deep questions, Mr. Potter.” Wandlore is a complex and mysterious brand of magic."
Don’t forget than in TOS the Romulans started using Klingon ships. They probably had a mutual defense pact or something. And birds of prey on your ship is kewl. “We’ll sell you some ships if you’ll let us borrow your bird templates.” (of course the real reason is someone stole the romulan ship model.)
Yup, the T1000 came through time as a sphere covered in human skin, and then left it. Just one more mysterious yucky thing for the dept of sanitation to deal with.
As I recall, the Romulan Warbird model was damaged, and they substituted a Klingon ship model with a throwaway line about Starfleet Intelligence getting reports of a deal where older Klingon ships were provided to the Romulans.
The G.I. Joe animated TV series from the 1980s was just what you’d expect, a group of vaguely military good folks battling the forces of a malevolent organisation called Cobra, using ordinary weapons and super lasers. Various conventional battles with cool tanks and planes with lots of explosions, the Cobra guys are beaten in every episode but escape and vow to return, notions of bravery and PSAs with “Knowing is half the battle”. Cobra’s chief, Cobra Commander, was eventually dethroned by Serpentor, a lab-grown clone of various historical bad guys like Genghis Khan and Hitler I think. With a ridiculous costume. All this in support of selling toys, of course.
But after years of this, there was G.I Joe: The Movie (still animated, 1987), where we learned that the whole Cobra organisation, unbeknownst to itself, was just the secular, military front of a secret civilisation of snake-themed superpowered supervillains who lived in the Himalayas (in Cobra-La, of course) and wanted to eliminate humans.
“Waas oonce a man… waaaasss oooonce a maaaaan…”
Gallifrey wasn’t named until the Third Doctor era - but is a pretty important part of the series mythos by now.
John Wick also kept adding new and weirder rules with every single installment.
4 adds in so many new High Table rules that John Wick really should have just used in Parts 2 and 3.
That’s a good one. Something else that people sometimes don’t realize: even though the Doctor’s appearance had obviously changed a couple of times, the word “regeneration” was not applied to the process until the Third Doctor turned into the Fourth. That is, in 1974, more than 10 years into the show’s run.
Prior to that, they just said “changed his appearance” or “changed his form.”
Oh and now you cannot create food or drink through magic although you could in at least one previous book.