Olivia asks for guidance from Sam Weiss at the bowling alley before joining the Fringe team in their investigation of a businessman in Seattle who attacked his boss spontaneously for no apparent reason and has been unconscious for 16 hours since. When he wakes up, he has no recollection of the attack, his hair turns white, and he dies. A series of similar incidents in the Seattle area occur that appear to have waking nightmares in common.
This episode's glyphs spell:
Dr. Laxmeesh Nayak's alter ego betrayed both himself and his patients by using their therapeutic implants as a way to steal their dreams and leave them exhausted.
The Observer walks down a staircase at the hospital while Olivia talks to a nurse about contacting pharmacies regarding Dr. Nayak's patients.
During the alley fight scene between Olivia and Shapeshifter Charlie in 'Momentum Deferred', the graffiti reads "to sleep perchance to dream." This foreshadowed the main theme in the plot of 'Dream Logic'.
The large "W+" in the Washington Hospital signage in 'Dream Logic' is shorthand for the W (weak force) boson. Weak bosons, a theoretical product of weak interaction and positron emission, foreshadows the condition of the ill cosmonaut in 'Earthling'.
This could possibly be because of Walter experimenting on Peter's brain as mentioned in "In Which We Meet Mr. Jones".
Walter and Elizabeth tried very hard to gaslight Peter and make him forget and disregard any thoughts he had about his kidnapping and his real home in "Subject 13".