We knew it was coming but I didn't expect Olivia to have to kill Charlie so soon. He must have gotten a part on another show or lost his contract or something. I always thought of him as a regular almost main character. Oh well they set us for the next go around with almost Omega Man. The symbol on the frozen is very close to the Greek Greek alphabet symbol for Ω only slightly off.
Now we get to try to figure the out what the coming final storm is. The thing is the educated will know that Alpha and Omega represent the beginning and the end. Couple the this with final storm and that means the end is near.