History Fridge / DoctorWhoS34E7KillTheMoon

** Why bother? The creature's life cycle was shown to be harmless to Earth. Why interfere at all?
*** For values of 'harmless' that include ten years of flooding and coastal devastation. Sure, that's not expected to happen for a few million years, but why take the risk?

* There's no way that the population / leaders of Earth -- the people who turned their lights off -- are going to let the ''second'' egg gestate. The moment the Doctor and Clara have gone, they'll be building new spaceships to get up there and kill the embryo.

* The creature hatched, then left an almost identical egg behind. This leaves open the possibility that ''this has happened before'', maybe even multiple times! We don't know if the eggs take hundreds of millions of years to hatch, or only a few million, or even less.
** The Doctor mentioned, several times, that humanity has had a giant egg orbiting above for several hundred million years without realizing it. However, as some fans have pointed out, the moon is actually several ''billion'' years old. So maybe the Doctor simply meant that ''this egg in particular'' was several hundred million years old.

* There's no way that the population / leaders of Earth -- the people who turned their lights off -- are going to let the ''second'' egg gestate. The moment the Doctor and Clara have gone, they'll be building new spaceships to get up there, kill the embryo, and extract the amniotic fluid to sell as fuel.

* The Creator/CharlesDickens quote in Clara's classroom near the end of the episode from "David Copperfield", ''"Whether I shall turn out to be the hero of my own life, or whether that station will be held by somebody else, these pages must show".'' It is a reference stating that as the story unfolds, it will have to be decided whether the main character takes charge of his own life, or if he will always be reliant upon others, or will allow others to make the big decisions on his behalf. It is a handy analogue to Clara, whether she is willing to step up and take matters into her own hands, or if she will defer to others (the Doctor) to make those choices for her.

* The astronauts just accept it when the Doctor tells them he's an alien time traveller, which seems odd, until you realize the astronauts may well have been ''briefed'' on the potential of meeting the Doctor on this trip. Enough world governments know about him that they have plans in place to locate him and/or the [=TARDIS=] in times of crisis, and this certainly fits the bill for a Doctor visit. Possibly a bit of StableTimeLoop going on, since [[spoiler: Courtney apparently becomes the President on the United States at some point; if it's either before or during this story, she knows damn well what's going to happen and could discreetly make sure the right people were ready for it.]]

* The astronauts just accept it when the Doctor tells them he's an alien time traveller, which seems odd, until you realize the astronauts may well have been ''briefed'' on the potential of meeting the Doctor on this trip. Enough world governments know about him that they have plans in place to locate him and/or the [=TARDIS=] in times of crisis, and this certainly fits the bill for a Doctor visit.
** Possibly a bit of StableTimeLoop going on, since [[spoiler: Courtney apparently becomes the President on the United States at some point; if it's either before or during this story, she knows damn well what's going to happen and could discreetly make sure the right people were ready for it.]]

** It's also a very subtle hint that the Doctor ''knew'' the creature was harmless: the Earth has had tides for a ''lot'' longer than the hundred million years the Doctor says the Moon has been there, so presumably this ''has'' happened before without the planet coming to great harm. Could the Doctor have seen the Moon-creature's ''parent'' hatch on a previous visit to the Mesozoic?
** The Doctor didn't know the Moon was a creature though.

* If the Moon's changing mass has taken out satellite communications, then just how much of the planet would Clara's message have actually reached? How many cities would have been on the wrong side of the planet to hear her, and thus have their lights on as normal? And how many major power plants are close enough to coastlines that they were taken out by flooding? Enough to cause a cascade, taking out others?
** All of which leaves aside the problems of (a) how they'd see everyone at once, and (b) the fact that the entire planet ''en masse'' voted to execute the creature in under an hour. You can't get all humanity to do anything as a group in 45 minutes.

* The Doctor's decision to just get the hell out and let the humans deal with a difficult situation by themselves seems harsh, and Clara's response was indeed well justified from her point of view. However, when you remember [[Recap/DoctorWhoS30E16TheWatersOfMars the last time he was involved in a pivotal event on which humanity's future among the stars depended]], his action do begin to seem quite different. The Doctor really ''is'' indeed better off avoiding getting involved in the events like that, which shows that he got the lesson from the last time.

* The creature hatched, then left an almost identical egg behind. This leave open the possibility that ''this has happened before'', maybe even multiple times! We don't know if the eggs take hundreds of millions of years to hatch, or only a few million, or even less.

** Possibly a bit of StableTimeLoop going on, since [[spoiler: Courtney apparently becomes the President on the United States at some point; if it's either before or during this story, she knows damn well what's going to happen and could discretely make sure the right people were ready for it.]]

** Possibly a bit of StableTimeLoop going on, since the President on the United States is [[spoiler: Courtney, so she knows damn well what's going to happen.]]

* A bit of a meta one. Some found the NoConservationOfMass aspect of the episode ridiculous and distracting. Felt it would have worked better if the gravity aspect of the premise was dropped, or else I'd appreciate even a TechnoBabble explanation from the writer as acknowledgement that the premise might be a bit difficult to believe. After all we're just puny humans, a bit of help would have been nice... like it would have been nice if the Doctor had helped Clara. The writer left us in the lurch just as Doctor did in the episode.

* A bit of a meta one. The NoConservationOfMass aspect of the episode ridiculous and distracting. Felt it would have worked better if the gravity aspect of the premise was dropped, or else I'd appreciate even a TechnoBabble explanation from the writer as acknowledgement that the premise might be a bit difficult to believe. After all we're just puny humans, a bit of help would have been nice... like it would have been nice if the Doctor had helped Clara. The writer left us in the lurch just as Doctor did in the episode.

* A bit of a meta one for This Troper who found the NoConservationOfMass aspect of the episode ridiculous and distracting. Felt it would have worked better if the gravity aspect of the premise was dropped, or else I'd appreciate even a TechnoBabble explanation from the writer as acknowledgement that the premise might be a bit difficult to believe. After all we're just puny humans, a bit of help would have been nice... like it would have been nice if the Doctor had helped Clara. The writer left us in the lurch just as Doctor did in the episode.

* The astronauts just accept it when the Doctor tells them he's an alien time traveller, which seems odd, until you realize the astronauts may well have been ''briefed'' on the potential to meet the Doctor on this trip. Enough world governments know about him that they have plans in place to locate him and/or the [=TARDIS=] in times of crisis, and this certainly fits the bill for a Doctor visit.

** It's also a very subtle hint that the Doctor ''knew'' the creature was harmless: the Earth has had tides for a ''lot'' longer than the hundred million years the Doctor says the Moon has been there. Could he have seen the Moon-creature's ''parent'' hatch back then?

* If the Moon's changing mass has taken out satellite communications, then just how much of the planet would Clara's message have actually reached? How many cities would have been on the wrong side of the planet to hear her, and thus have their lights on as normal? And how many major power plants are close enough to coastlines that they were taken out by flooding? Enough to cause a cascade, taking out others?

* If the Moon's changing mass has taken out satellite communications, then just how much of the planet would Clara's message have actually reached? How many cities would have been on the wrong side of the planet to hear her, and thus have their lights on as normal?
** And how many major power plants are close enough to coastlines that they were taken out by flooding? Enough to cause a cascade, taking out others?

* The creature hatched, then left an almost identical egg behind. This leave open the possibility that ''this has happened before'', maybe even multiple times! We don't know if the eggs take hundreds of millions of years to hatch, or only a few million, or even less.

* The astronauts just accept it when the Doctor tells them he's an alien time traveller, which seems odd, until you realize the astronauts may well have been ''briefed'' on the potential to meet the Doctor on this trip. Enough world governments know about him that they have plans in place to locate him and/or the [=TARDIS=] in times of crisis, and this certainly fits the bill for a Doctor visit.