The Lost season 5 finale may have ended with the Island being blown up by a hydrogen bomb, but what has fans even more intrigued was the opening scene between Jacob and a new, even more mysterious character. Played by Deadwood alum Titus Welliver and credited in the official ABC press release as "Man #2," who is this man who went to such extreme lengths to kill Jacob?
The short answer is: He's the Devil.
At least that's the most popular theory that combines all of the clues we were given. Whether it's literal or simply allegorical, there were certainly strong similarities between the relationship of Jacob and his enemy and God and the Devil.
Black and White
First, in that scene Man #2 wore a black shirt while Jacob wore white. The colors have been used many times in Lost to show the battle between good and evil, the forces of light and dark. They go all the way back to when Jack discovered the black and whites stones in the caves by the bodies they called Adam and Eve in the first season
It's obvious from their scene together that Jacob and Man #2 have a long history together and that Man #2 has a strong desire to kill Jacob, but for some reason he can't. This could mirror the Devil's desire to kill God, only it's not that simple. The resentment also seems to stem from a common past, as the Devil was once an angel of the Lord who fell from Heaven.
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