- Big-Lipped Alligator Moment: "Purple — the colour of DEATH!" Perhaps it's an esoteric reference to Flash Gordon Conquers the Universe? Alternatively, mauve was the colour of danger amongst most advanced species in "The Empty Child".
- Contested Sequel: This episode is considered by many to be a somewhat inferior follow-up to the last one, mainly because of the Leandro subplot. At least one reviewer directly stated that it detracted from Me's role in the story.
- Fanfic Fuel:
- Ashildr's eight centuries of adventures between the last episode and this one — and four more between when the Doctor parts from her and the present day. Moreover, her mission to 'look out for the people you abandon' suggests she could seek out other companions after they've left the Doctor. (The Expanded Universe jumped on this, in fact — The Legends of Ashildr, a short story collection set during the two-parter's "downtime", was published shortly after Series 9 concluded.)
- Given that the final scene between the Doctor and Clara is full of "shipper fuel", and the fact the episode immediately following doesn't live up to Clara's episode-closing request of going somewhere "magical", one can imagine a few fanfic ideas were born.
- Heartwarming Moments: Clara's spontaneous hug given to the Doctor at the end. Not just heartwarming, but also a major character development moment as we see the Doctor enjoying the hug, firmly putting to bed his "no hugging" attitude.
- Hilarious in Hindsight: Yeah, Me does eventually kill the Doctor in Game of Thrones.
- Nightmare Fuel: Ashildir tore off some pages from her diaries since the memories written there were too painful. The ones about her three children dying from plague are not among them. Since it's never revealed what was written on those pages (not even if it was something she witnessed or something she did) might also count as Nothing Is Scarier. It could just as easily be happy times only painful in hindsight.
- Although Ashildir does point out that she leaves the pages about her children dying as a reminder not to have any more, which wouldn't exclude their deaths from being her most painful memory, instead of meaning that they are less horrific to her than the torn-out pages.
- The fact she decided not to have any more children after losing three of them at once doesn't preclude the grim possibility that she'd had kids before them. She may have torn out the pages so she could forget the pain of either watching them age to death or having to abandon them so she wouldn't see them die. Or see their fathers die, for that matter.
YMMV / Doctor Who S35 E6 "The Woman Who Lived"