I think it was a bit of a pointles case as they didnt actually get Hannah convicted, but I guess they needed it to be left open as it lets it be the final straw for Sara and thats when she finally decides to leave. I thought it was a bit random that she left Gil the way she did, I think he deserved better than a letter, she should have actually spoken to him about it. And who knows? If he loved her that much he might have gone with her. She said in the letter she wouldnt trade their love for anyting, but hasnt she just gone and traded their love for a life elsewhere? Although I am happy at the fact she MAY come back in further series like a one off appearence but the last few episodes I have watched I havent enjoyed and I think that reason is because Sara hasnt been in them as much as she usually is. So I think I wont be enjoying the rest as much as I use to. I still think they should have kept her and gil together, she just gone out of it to find another job or done something else but kept them together, I found it pointles them finally getting together, coming out to everyone, wanting to get married and then she goes and leaves. I dont see the point to be honest of building their relationship up, and finally disappearing. It shows that Sara was weak and thats not really how I imagined her. But I guess thee is a breaking point in all of us.