Zarek and Gaeta control Galactica. Roslin and Baltar fleeing to the Rebel Basestar. Apollo, Starbuck, and Tyrol trying to take back the ship. Adama and Tigh ready to go out in blaze of glory. Next week is going to be epic.
I think the Colonel throws himself on the grenade. Adama calls him friend and he decides to sacrifice himself to save the Old Man and confirm his humanity.
The preview has Adama seemingly in an airlock, blindfolded, having been found guilty of treason or something. I think he is about to be executed, not that it would happen.
I think it would be pretty awesome if another resurrection ship was indeed around and they were being reborn after all.