Obviously, not needed since Season 1 and his death, but he has been in a lot of flashbacks especially in S3.
What do we know about him?
He is a doctor, a surgeon even.
Has seemingly super-human strength.
Creepy to the point of being goofy. I mean, yeah, he was weird as our first introduction to the Others, but even in Others society he seems unusual.
He is very trusted by Ben. It was he and Goodwin who were sent to scout out the crash survivors.
He lived among the Losties and fooled Locke, undetected until Hurley found the manifest.
Ethan has been off Island several times as a member of and recruiter for Mittelos.
He does plumbing on the side.
He kidnapped Claire. He had an unhealthy infatuation with Claires unborn baby. (What if CS is Jacob? That would explain a lot!)
He is buried on the other end of the beach from the Lostie cemetery.
Does any of this mean anything?



