It certainly wasn't the ending I expected, and it was the first episode where I didn't tear up, but I am kind of glad they did hot reveal how Jack passed yet. Knowing how and when Jack is gone will remove a whole element of the show I find intriguing and will just give it a whole different feel too early. If they are truly separating, that will provide an interesting storyline for next season. I'm left not fulfilled but curious.
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I don't repeat gossip, so listen closely...