Lordy lordy wow. It's been a while since I've seen a show dispose of a major character in such a sudden and brutal fashion and as soon as Derek turned that corner and took the bullet to the head, my jaw hit the ground in complete shock and disbelief. As soon as that terrible event happened, it was completely clear that the stakes have been raised and all bets are off.
This is a marvelous "set up" episode gearing up for next weeks season finale -- sadly, probably the series finale as well. Personally, all expectations I've had so far is out the window and, as far as I'm concerned, anything can happen, anyone can die, and the future is unwritten.
Too bad this show has spent the last two months in a coma. It's only getting good again at the end.