What if the man with the eyepatch is Radzinsky, he faked his death, found another hatch and started living there. He has an eyepatch what if he was living in the station the tail-section people found with the glass eye. He was the one Kelvin said figured out how to fake a lockdown he had the idea for the invisible map what if he created smokey, and when Locke and the others went to the Pearl killed Eko as a warning. Even if any of that is true that still wouldn't explain why he faked his death,or why he would get upset when Eko would not confess. Just a thought. (: