In an emotional series ending on 'Lost' (Sun., 9PM ET on ABC), a familiar face returns to explain the two diverging realities and how all the characters' lives have become so intertwined.

[Spoiler alert.]

In the final scenes of the series, Jack's (Matthew Fox's) dead father returns to bring his confused son up to speed. It's a touching, telling moment, and one that ties up loose threads from the entire last season and brings closure to the series overall. What did you think of the series finale? Are you satisfied with the end?