LOL! If it’s the Big Mystery, sure, but I think the Observer himself is more the story this time…
Didn’t they used to have a grand piano in the lab? Why are they rolling in an upright? Roscoe would need a Hammond organ not a piano, wouldn’t he?
What the heck os going on with Walter’s 3D glasses?
So tragic and awkward. 
Aw, Peter. You’re really getting a raw deal, here, and it really is no one’s fault… 'Cept that frakkin Walternate…
Oh Olivia. Peter’s only going to have the strength to make overtures for so long. You’re going to miss your opportunity.
I like how they are really delving into the relationship between Olivia and Peter and how it’s changed now that she’s come back and he figured out that he was in love with Faux-livia
Don’t be afraid of the dark.
Close, but not quite. 
It’s you never walk alone from Carousel, right?
“Walter, are you all right?”
“If ‘all right’ means despondent, then yes.” 
I love the detail on this show. That Roscoe is stroking the piano keys as he talks… So perfect!
Part of the theme was, but it changed. It went down when You Never Walk Alone would have gone up. It was one of my recital pieces a hundred years ago.
Ashram
Should Walter really be so surprised? The dude pops up in his life fairly often.
Walter’s Strawberry Milkshake Soul Mate. 
“You had me at ‘domination’.”
Walter’s joy was so cute!
This reminds me of Dean and Death.
Yes, yes and the butterfly flaps it’s wings and causes a hurricane half a world away.
A bit of a melodramatic story about the firefly.