Besides seeing one of my favorite Jamie and Claire exchanges come to life (I love you, I worship you...) in 06x02 "Allegiance"...
This episode was a fascinating examination of what "Allegiance" means, for each of our key Outlander characters.
Roger - his allegiance is to Brianna (in the way he supports her inventions and pulls her up when she feels down on herself). And to Jamie (in the way he goes to find Fergus, in Marsali's time of need. Truly representing the whole Fraser/MacKenzie family in that moment).
Ian - his allegiance is to the Mohawk and Cherokee, of course. And to his brand-new nephew Henri-Christian, who he recognizes as being so very precious. And to his uncle, who he guides to make the right decision.
Marsali - her allegiance is to her husband Fergus, despite his awful faults and his terrible absences. And to Claire - whom she trusts above all things, and considers to be her mother. And to her precious new bairn, who she adores and will care for no matter what others think.
Bird Who Sings In The Morning - his allegiance is to his people. He will fight for them, demand what's theirs, come what may.
Brianna - her allegiance is to her family, first and foremost. She cares for them so deeply, which is why she seeks to bring a bit of modernity to their world. She supports her mother and father, and her husband, and their family. She guides them to do the right thing, to make the right decision. And of course her allegiance is to Roger, to supporting his unexpected vocation as a minister.
Tom Christie - his allegiance is to his God, supposedly. Though clearly it's to his own causes. He seeks to use God as a wedge. Yet Jamie is the one who ends up finding and using that wedge against Tom.
Jamie and Claire - their allegiance is always, always to each other, and to the family they have worked so, so hard to build. They give each other the space to pursue their own interests, meet their own obligations, take the leadership roles that they're clearly so well-suited for. They care deeply for their family, and their household, and their tenants. But at the end of the day - their sole allegiance is to each other. For without that soul-deep commitment, without the unconditional love between them...there's nothing.