Portrayed by: Daniel Dae Kim and Yunjin Kim
Die in: "The Candidate" (Season 6, Episode 14)
Jin and Sun spend most of Lost's latter seasons separated. Their respective storylines are driven by the same goal: They must reunite.
With time travel, the vengeful Smoke Monster, moving islands, and murderous mercenaries standing in between them, the couple that previously healed their fractured marriage on the island years before, finally finds themselves on the same beach, of the same plane of existence, in the same year.
It's a beautiful moment, anchored by that beautiful, trademark Lost score. Fast forward one episode later and they're up to their necks underwater, drowning from a bomb the Locke-ness Monster planted on their submarine, refusing to separate again. And so they die, hand-in-hand until rigor mortis takes effect, after enjoying maybe 10 hours of being back together, orphaning their toddler daughter back home on the mainland. A nice, swift kick in the gut from co-creators Damon Lindelof and Carlton Cuse while on their way out the door.