Quote:
Originally Posted by
videobruce 
But, was the the boy or Olivia? It sure looked like th boy.

What was the deal with the white tulip?
What was in that letter to Peter from Walter?
What was the motion the bot did with his finger to his lips twice?
It was Olivia who killed Windmark. First she blew out the lights, then she smashed the bastard before he could teleport away.

The white tulip was Walter's symbol of hope, his sign that God was listening to him. It refers back to another time travel episode (with Peter Weller). There were several of these throughout the series.
The tulip WAS what was in the letter. Walter intended it as a symbol of hope for Peter, too. I believe Peter understood that, based on his final reaction to seeing it.
I think the boy's "shush" was to let Olivia know that she didn't need to ask him for help - just be quiet and click her ruby slippers together so she and Peter could return to Kansas. The power was in her all along.
So, the "sacrifice" was exile and not death. And as Astrid said, "This isn't over, Walter." She was right. The plan worked. Walter exists in the future, waiting for a Fringe movie to come get him.
