Where haven't we seen it before? Lost, Alias, and 24 kept going by introducing yet another mysterious organization every few episodes.
I hope this show will avoid the conspiracy after conspiracy plot device (oops too late, both his wife and kid are dead! ) and will be more like Dexter: a guy with a strange mind who is trying to do what he wants to do in a world (or two worlds) where things are changing around him. Every episode should challenge his condition and his ability to maintain it, otherwise it's just the cop who got gnarly investigative powers from a car accident.