Spoiler: reply yeah the more i read and find out, the more i am sure this isn't a "Dear John" letter. from what me and a few other people have managed to read from the letter, it sounds like Sara's past is really haunting her for some reason after another encounter with Hannah (from the ep "unusual suspects") and she needs to sort things out, but I don't believe at all that it's a "i'm sorry this was all a mistake" kind of letter! - from odd bits i've picked up here and there, this is kinda gonna be like a sabbatical for Sara, a personal quest she's got to go on, lay some demons to rest, get her head sorted - that kinda thing, this is also where I think they WERE going to take both Grissom and Sara to SF but went in another direction instead, maybe this letter is the "other direction"?? - i'm still 100% certain that this isn't the end of GSR! ah well not long till we find out i guess!