Remind me why John Noble doesn't have an Emmy? As we thought, old megalomaniac Walter is starting to come to the surface, Nina (yay Nina!!!) saw it, we saw it, but more importantly Walter saw it. Noble does a great job turning it on and off with very few words, the opening the safe scene you could see "evil Walter" go away mid-shot. We got gobs of Walter and William Bell backstory. Peter is still not 100% getting how "observer power" works, which is nice, but Olivia has to notice soon (as should Anil). Loved the dissolving observers! I'm also still ok with this season's "quest of the week" format. I'm not sure I can wait 3 weeks without a fix, I'll need to start rewatching some of the previous season episodes with commentaries.