[spoilers] Lucas. Just Lucas.

[Nitrus]

I think your view of Lucas is somewhat blinkered, as if you won't/can't accept that he has an agenda. From his first episode we weren't sure where Lucas' loyalties lay, with us or the Russians. So I don't know where you've got this idea of him always being loyal to his country? We don't know what he told the Russians during those 8 years. We just don't.

It's completely conceivable that his character turn without reason, it's in the nature of his job. I think it's a little bit naive to think that he will always be this dutiful figure whose loyalty doesn't falter. He's already shown us his lack of loyalty to Maya, who knows who or what else he's run away from.