This week's we're watching Peter and Olivia. In the Lab. With the Revolver and... oof. "Peter" is a masterclass from John Noble, who succeeds in doing what should not be possible in the middle of two episodes revealing Walter's most heinous crimes: forcing the view to empathize with him. Meanwhile, in present day, poor Peter is truly baffled as to what the frick is going on with his little family as Olivia and Walter struggle in their own ways to do the right thing. When Fringe is good, it is truly excellent.