This was a good setup episode, the pieces are being put in place to let the last two episodes come to a conclusion. Everyone is together now, Eichorst and Setrakian have had their moments and this seems right as it always seemed their feud was the strongest, most of the dead weight has been cast off and we're set to go.
I wonder where they're going with Zack, I feel he's gotta go but I'm not sure it will be Eph's sacrifice or if maybe they can somehow do something with him. Maybe some kind of poetic justice, could Zack end up sacrificing himself to trigger the nuke to take out the Master? I don't think he's ever show much strength of character but maybe out of spite or something with how he's been manipulated?