This episode is over whelmingly blue. Read into that what you will.
Also, I can't seem to let go of the fact that the watchers worked for Walter in the story. We know that he has had some kind of relationship with the Observers in the past, does it mean that they do/have/will work for Walter?
What about the fact that Walter says that this Peter Bishop is not related to him??? If that isn't a clue to S4, then what is it?
W.C. Fields Forever
All You Need is Lunch
I am the Waitress