This episode's glyphs spell:
Observers are featured in this episode.
A billboard in 'Anomaly XB-6783746' says "Smriti Isolation Tanks", foreshadowing Walter's use of the iconic sensory deprivation tank in 'The Boy Must Live'. The word "Smriti" is Sanskrit for "that which is remembered," and Walter went into the tank to help him extract a memory buried in his subconscious.
In "Anomaly XB-6783746" Michael gave Walter back memories of the original timeline and showed him that September's words about "the boy" also referred to Michael. (Image 1)
Michael's disappearance in the future was a mystery, like Peter's disappearance in the Redverse.