I think the old friend is Nyssa. And ARGUS is going to help out with the show down. But yeah, Sara will leave town… or die.

I absolutely loved this episode even though the earlier parts were a bit slow and uneven. Roy was mostly a filler in the whole thing and I do hope they'll stop with his 'hulk smash' thing soon.
Moira Queen… you'll be missed! You were fierce as hell.