...Meanwhile... the scar and the symbol on the box... I'm glad someone else noticed that! I thought I was imagining it when I first saw it, especially since she didn't seem to react... but then the show ends on her going to see Spader, so maybe we find out next week that she recognizes the scar on the box too.
I'm guessing that it isn't a scar at all, but a deliberate branding.
He gets the explosive vest as payment for disarming it. That's a bit reckless. At least it didn't stop at 1!