My theory on Quinn throwing away the bullets was he figured Astrid would try and stop him escaping at some point by shooting him (non fatally), so emptied the gun to stop her.
I am curious as to why dar went to some effort to keep Quinn alive, only to (seemingly) attempt to assassinate him shortly after. He doesn't seem to be in any way sentimental. So, I'm coming round to the idea there's more to it than just Dar = evil.
I also can't figure out if Seku (sp?) was part of the plan from the beginning (he must have been otherwise they wouldn't have got the undercover guy to befriend him right?), or if they planted the bomb purely to discredit Carrie. Surely too much of a coincidence that the ex CIA officer happens to find herself defending the guy the CIA are using as a patsy for bringing down the PE?