Sure, more unanswered questions, but a very interesting ending.
Some random thoughts:
First, I think the person in the coffin was Ben.
The thing that really popped out at me was that Jack said to the doctor at the hospital to go check his father. If that really was the current story time line, wouldn’t he have known his father was dead and not made a comment like that?
What was Naomi doing with that picture if Penny didn’t send the ship?
Speaking of Penny, how the heck did she know to try that frequency to reach the Looking Glass station?