I'm thinking...Jack never found his dad's body on the Island, just an empty coffin. I can't remember, did he ever view the body?

Then he heard his dad's voice over the intercom while in the shark tank.

And now a connection that needs either Christian or Sawyer to answer it? I just dunno. A long time back it was suggested that Christian was "him". Given the number of theories about this show that have circulated I'm sure some of them are actually true.

__________________
"The Naked Gun!"

Frank Drebin remembers a lost love.

Frank: It's the same old story. Boy finds girl, boy loses girl, girl finds boy, boy forgets girl, boy remembers girl, girls dies in a tragic blimp accident over the Orange Bowl on New Year's Day.

Jane: Goodyear?

Frank: No, the worst.