In this episode, the absence of Colonel Broyles shifts the dynamic of the Fringe Team as they investigate a bioterrorist armed with an insect that has a taste for human flesh. Meanwhile, Fauxlivia is reunited with her beau and Walternate remains determined to save his world but discovers there are certain lines he will not cross.
This episode's glyphs spell:
The Observer can be seen at the airship docking station when Frank comes to pick up Fauxlivia.
The passing VW Beetle and Walter's focus on it in 'Concentrate And Ask Again' foreshadows Dr. Armand Silva's use of beetles in 'Immortality'.
The license plate of one of the victims in 'Immortality' is "APT6B", foreshadowing the apartment under investigation in '6B'.
We learn in the very next scene that Walternate ignored his wife's requests to repair their marriage. In "Immortality", many years later, Walternate had a Japanese mistress named Reiko.
In "Immortality" Walternate had a Japanese mistress named Reiko. (Image 1)