The reveal about what The Legend tells Hughie about the plane incident absolutely changes everything. Finding out that the Seven let all those people die because they couldn't figure out how to save them without looking bad is peak Ennis cynicism.

Butcher's reaction when he realizes Hughie is getting too close to the truth is chilling. You can see him calculating how to handle this, and it's the first time you really question whether Butcher is actually one of the good guys or just using Hughie.

This issue is essential for understanding the whole conspiracy at the heart of the series. Can't talk about it without spoiling, but if you've read this far, you need to see where this goes.