Locke banging on the hatch door and the light coming on.
He wasn't on the plane...Ethan revealed!
I dug up that grave, and found a man...named Henry Gale!
We have to go back, no question, but also its follow-up at the end of S4, after a whole season we come back to that moment and Kate slams on the brakes and comes back to say "what do you MEAN, "we have to go back"?!?".
It only ends once...the Jacob reveal, it blew my mind. It's hard to imagine now, but Jacob was such a mysterious enigma before season 6.
Also, make your own kind of music, Desmond in the hatch, and its mirror Juliet at the others book club into the plane crash.
Cabin Fever and Richard Alpert at Locke's birth, almost everything in that episode, the test, the science camp, the scary dream, the cabin, Claire, Christian, and "we have to move the island."
Catch a falling star-the scary remix, with the temple destroyed.
Ben's monologue at the end of Dr. Linus.
His name is Jacob, (another baby pops out).........I only chose one name...
The final reveal, for better or worse, it was a surprise.
These are my favorite moments.