It was very astute for the Night King to drag around those mile-long giant chains on his journey just in case he took down a dragon that sunk into a lake.

Yeah - that throw-away line pretty much resolved all of last week's debate here.   

The scroll was from season 1.  My wife went online to look it up.  Something Sansa was forced to write.  I expect it to cause drama between the Stark girls.

This is also one of my questions; I also feel like L could have sent a raven and ended the whole thing. I do feel there's another shoe to drop here with the theory, though. Mostly because if it proves out 100%, it dislocates Dany from her role in the narrative (rightful heir to the throne, from her perspective) which seems to me, against what GRRM is doing in the story. Could be wrong though.

She's still be the rightful heir to the throne - trueborn daughter versus bastard son.

I thought Flash was pretty fantastic.  Apparently in 2017, high school kids legitimately aren't bullied by jocks anymore.  They're bullied by privileged, rich, incompetent douchebags.  And this Flash fit that role perfectly.  So it was a nice update, I thought.  And casting him non-white was kinda refreshing (how many times have we seen the white alpha-male cast as the villain?).

I'd say Zendaya is also a reflection of modern times.  The girl comic book nerds dream about isn't the super-hot cheerleader.  It's the brainy, competent fellow-geek.  I expect MJ will "bloom" over the course of the next film to be suitably attractive along the lines of Hermione.  But for this film she couldn't overshadow Pete's main crush (also a brainy geek, but way hotter).

I think the engagement was intentionally left open to interpretation.

I'm guessing they split up the fleet and sent the IronBorn ships to pick up the Dornish army while the fleet she took from the Masters was the one ferrying the Unsullied and Dothraki.

I wonder if they will bother to explain how Euron found them so easily, or even knew what the hell they were doing and who would be on the flagship. Probably not.

Thanks.  I missed that then.

As for how they were found - it's likely there are spies for Euron among Yara's Ironborn.  It'd be trivial to get a note with the details of the trip out to someone who could pass it on via raven.

Sure there is... somebody dies from not-a-head-shot, and then stays dead.  The zombie plague has ended, just as mysteriously as it started.

 “When your tears have drowned you, the Valonqar shall wrap his hands about your pale white throat and choke the life from you.”

That's open to a lot of interpretation... I read Valonqar means "little brother."  But it doesn't necessarily mean HER little brother.  It could mean the Three-Eyed Raven...

The pale white throat phrase certainly adds credibility to the Night's Queen theory.

That was definitely Jorah.  And apparently there was another Easter Egg WRT Jorah in the episode.

Also somebody pointed out that Sansa is now sporting Cersi's hairdo from the first few seasons of the series.