LOS ANGELES (AP) -- "Lost" star Daniel Dae Kim says one of the TV drama's biggest mysteries — the Smoke Monster — will be unveiled, and soon.

Kim says the origin and nature of the malevolent dark cloud will be disclosed and viewers will even get a glimpse of its lair. Turns out the monster is as "old as the island" that's been home to the Oceanic jet-crash survivors and their foes.

Kim also cautions against expectations that his character, Jin, will reunite with his wife, Sun, even though Jin survived a freighter explosion and Sun returns to the island after escaping it.

Those events don't mean "they're particularly in the same place or chronologically in the same time," Kim says.