Season 3 finally yook Sidney to Germany to find some papers, then Jack shows up and says she was never supposed to have found that.
Season 4 forgets all of this and suddenly in episode 13 he says: "We haven't really talked since--" Sidney interupts: "Since mom died."
What the heck, when did that happen? Did the viewer know this at the time?
Also, was the papers in Germany about Jack enlisting Sidney to the child training during the 80's?
Please, someone explain, I am confused!