I'm not sure it's a great example of what the show was trying to do, but I do think it was one of Eliza's best episodes. The difference between "Vows" and the one after it with the breast-feeding is startling.
It could've been a family business you know, the arms dealing. Could've been one of his dad's arms dealer friends in the 90s.
Also, I have to appreciate a director who casts Jamie and gets him naked. I mean, there are so many directors who fail at what would seem like a basic courtesy. ;)