Just going through my re-watch notes in the very unlikely event I caught something that hasn't been mentioned (and I don't think this was)

In light of Charlie's recent activities surrounding his ring, I found it interesting that the ring had been mentioned in the Pilot.  When he's talking to Kate about Driveshaft, he mentioned that the ring represents the bands "second tour of Finland", in spite of the reason he got the ring on that tour and the fact that it was really a family heirloom.

And another observation:  Kate unlocked her handcuffs during the break-up of the plane, but said cuffs appeared to be tied to an ankle chain when she drank her orange juice.  When the handcuffs were found later, there was no sign of the ankle shackles.  Does that type of restraint system break into its component parts?  And if so, what happened to the other part?

Good observation on the cuffs WOC. I suspect they didn't think that one through. Unless the other parts of those cuffs got lost in the crash...

I always thought they were somehow attached to the seat or something... but I guess planes don't really come standarly equipped with a handcuff dealy LOL.