The Observer can be spotted walking in the Bishop Dynamics lobby, just as Walternate arrives.
Hidden Glyphs: If you want to count cartoon versions of the Fringe glyphs, then butterflies, seahorses and frogs can be found near the Jacksonville Family Daycare Center entrance. There are also some seahorses on the Bishop family's fridge.
Next Episode Clue: As we mentioned in the last Easter egg roundup, the episode "6B" contained an abundance of tulips, which were in fact references to "Subject 13". In this episode, a very special field of white tulips is the location that young Peter visits twice. Once driving in the car with his mother, and once when he finds Olivia. The White Tulip was also a very important symbol for Walter Bishop:
"I, too, attempted the unimaginable, and I succeeded. I crossed into another universe, and took a son that wasn't mine. And since then, not a day has passed without me feeling the burden of that act. I'm going to tell you something that I have never told another soul. Until I took my son from the other side, I had never believed in God. But it occurred to me... that my actions had betrayed him and that everything that had happened to me since was God punishing me. So now I'm looking for a sign of forgiveness. I've asked God for a sign of forgiveness. A specific one, a white tulip.". - Walter Bishop (to Alistair Peck) in White Tulip.
Glyphs code spelled out SWITCH.
Some other interesting screenshots from Subject 13:
Balloons: If you look closely up in the right corner, way up above the Jacksonville Daycare Center, there appears to be a balloon floating in the air. Is it a hot air balloon, like we saw in the episode "White Tulip"? Also, here is the drawing Olivia made after she crossed over.
Massive Dynamic is Walternate's Bishop Dynamic, an aerospace contractor with what looks like its own space shuttle program.
Space Shuttle: The episode was a little too blurry to quite make this out, but it looks like one of Peter's toys is the space shuttle Discovery. Discovery launched four times in 1985, the year before the Challenger disaster. The irony is that after many months of delays, Space Shuttle Discovery launched for its last mission - one day before "Subject 13" aired.
Olivia explodes into a fireball, we see young Peter at home, playing with the toy airplane that his mom bought him at the toy store. The unusual thing about this scene is Peter's commentary:
Approaching the building, requesting clearance to dock. [imitates plane engines whirring]Has young Peter never see a real plane fly?
Random tests at the center.
Name that tune (on the wall)
Anyone recognize this movie poster?
For the Polivia "shippers"!