First of his Name - Game of Thrones - 4x05

What?!
What is the word for all your worldly assumptions being completely undercut?

Lysa's admission/exposition/reveal that it was she who poisoned Jon Arryn, at the behest of Littlefinger, and causing all the events in the series to take place is a bomb.  It was never stated but widely assumed the Lannisters were responsible.  Not only that but Lysa purposely misled her sister and brother in law about the culprit.  I suppose we should have realized Lysa is not the most reliable person when we met her in Season One and saw she was bonkers.

The series' inciting incident has changed so everything else has to be looked at differently.  So Ned's assumption that Jon Arryn was murdered for being too close to the truth about Robert's heirs is false.  Jon dying left a hole for Robert to move Ned into.  Knowing Ned would fail (partly due to his own contirubtions) Littlefinger unleashed chaos in the North.  The claims to the throne are almost just a happy coincidence at that point as Stannis and Renley are prepared to rip the country apart as well.

All so Littlefinger could marry Lysa?  Well, all so Littlefinger could gain a kingdom (and an army, which we know Varys fears).  Who knows?  This was a mystery we weren't even sure was a mystery.

Jon Snow's Parentage
One of the other mysteries introduced early in the show is Jon Snow's parentage.  Undercutting the Jon Arryn assumption makes me think that the clues that lend to Jon Snow's true mother (and possibly father) are going to be completely undercut as well.

Craster's
Speaking of Jon, I like the detour to Craster's.  It allows Jon to make some more bones and gain more respect and leadership skills before the coming battle.  Had it gone another episode, it would have been too much, but this was just right.

How to Fight
We're back at the Eyrie, the place Bronn beat Ser Honorable in a proxy fight between getting things done and getting things done on the high road.  The surviving Starks are learning a thing or two about getting things done.  Jon doesn't mind stabbing Dirk or whatever through the back of the head.  Arya's going to process the Hound's advice on what armor and a big sword* do when against agility, and Bran doesn't think twice before inhabiting his friend and human wheelchair to snap the neck/life out of a threat.  Get it, Starks.

* Meryn Trant?  Meryn Fucking Trant?!

The Formula
If Game of Thrones or ASOIAF have a formula it is either take a fish out of water, or to put two characters together who don't get along then have them slowly gravitate toward each other.  Pod and Brienne...this may be the start of a beautiful friendship.

Coppers and Silvers

• At least the Lannisters have the good taste to know your second wedding shouldn't be as extravagant as your first
• Mace is just bumbling about.  Perfect pick to be a judge.
• Lysa was surprisingly welcoming, but it didn't take long for crazy to win out
• Margarey called Cersei "sister" but with a question mark.  Does that qualify as stepping to Cersei's previous threat about calling her that?
• The mines are dry.  Despite Tywin chastising the New Money Tyrells at the wedding, the Old Money in fact has No Money.
• The Iron Bank continues to loom like that paper you don't want to write
•  Why even bother to tell Robyn the secret about Sansa?
• Please don't get married.  That'd be a genetic disaster
•  Locke will be viewed with honor as a Night's Watchmen who died in the line
• It occurred to me....where was Craster getting all this food and booze?
• Disappointed to see Arya's added Thoros and Beric to her list.  But she is pretty pissed about the whole Gendry thing.
• Digging the visions of the Great Deku Tree.  These are intersting parts of the book that seem they would be difficult to adapt to the series, and the road the show is taking is encouraging.
• If you want to understand GRRM, watch this video where he describes the geography that protects the Eeyrie.  You'd never know it doesn't actually exist.  Imaaaginnaaaaaaatiooooon!  Imaginaaaatioooon.   
• We continue to ignore the Ironmen (yes!) and get more mentions of Dorne (Oberyn's daughters!)
• The plays into my theory that the Ironmen story will get three scenes this season to expedite things.  It also gives us hope that we are going to see a lot of stuff from Dorne in Season Four.  Tell me this guy shouldn't be Doran Martell. He's in everything but I remember him from Heroes and the Pakistani ambassador on West Wing