All the juicy details you might have missed. Warning: contains spoilers.
Does he actually know something, or is he just being a little shit?
It's no wonder she's worried.
Yes, it made me cry. And if I have to watch this little girl die in the next episode I will throw things.
Seems she really took on board some of Cersei's lessons.
He just kind of hangs in the background, like he's a part of the furniture and always has been. Which begs the question: why didn't they just...do this the whole time? Instead of making him basically irrelevant at this point, when he really shouldn't be?
Also, if he's re-introduced in this one scene just to have him killed off next episode I will, once again, throw things.
They are still the shield that guards the realms of men.
A reminder of how important Gendry has always been to Arya.
Jenny has been mentioned once before in the show, in passing by the maesters at the Citadel, who were dismissing her claims that she was descended from the Children of the Forest.
More significant for the current story is the fact that Jenny was married to Duncan Targaryen (Aegon V/Egg's son, named after his friend Duncan the Tall). Duncan Targaryen forfeited his claim to the Iron Throne in order to marry Jenny. Jenny was also friends with the woods witch who prophesied that the Prince That Was Promised would be born to Aerys and Rhaella's bloodline. So the song is very much tied up with Jon and Dany's story.
And now Jon too, weirdly enough.