The single-minded Jon Snow (or: all the wight stuff)
Thanks to a scroll from his crippled kinda-brother, Jon Snow finally has some evidence for his never-ending lecture to our main characters about the fact that there's a war between the living and the dead coming and they’re all too busy squabbling over kingdoms. We get another Dragonstone map-room meeting -- now rivaling the Iron Throne room for how many key plot points occur there during the series -- where Jon and Tyrion manage to convince the lead characters that they must do more to combat the White Walkers than mine dragonglass.
Because he’s Jon Snow, he has the foolish idea to lead an expedition to capture proof of the undead threat. Sure, it seems noble to put yourself in harm's way with your men, but let’s look at the crew we have assembled here: Gendry with Season 7 Warhammer accessories, Tormund, and freaking Jorah Mormont. That’s not a special ops group to thumb your nose at.
I’m sure the people of the North (and we see ample evidence that I’m right) would appreciate Jon letting someone else capture a wight while he got to, I dunno, go home and rule his kingdom or at least say hello to Bran and Arya before setting off to meet certain doom. Especially now that he has Berric Dondarrion, Thoros of Myr, and Sandor "The Hound" Clegane, it seems like he doesn’t really need to be doing this. Priorities, Jon. Priorities.
Then again, who is Jon Snow if not a character constantly marching toward his own doom, seemingly oblivious to the fact that he has any power to change it. Yet, at the same time he’s winning over Daenerys and Drogon with his charm and may not have to bend the knee… the exact opposite of his usual single-minded doom problems. The Dany-Jon pairing feels a little like the Ygritte-Jon pairing from Season 2, because it’s nice to see both of these characters flirt and hang out in caves together, but "you know nothing Jon Snow." Their love is doomed. Ygritte was always too much of a Wildling to accept Jon’s honor problems, and Dany being his aunt should cause its own set of problems.
Jon needs to survive next week and bring a wight South so he can stop the war between the two queens and shore up the armies of the living… but even if the threat is immediate, there’s going to be some fallout when these truths start coming to light. Maybe we’ve been too hard on Jon for being single-minded, because he has some very awkward conversations with his people coming up.