The Observer can be seen standing on a corner when Olivia is driving to save Ella from the program.
The glyphs in this episode spell "Bishop".
The item Gregory clicks on at the beginning is titled What's That Noise. At the end of the previous episode there is a book with the same title laid over Olivia and Ella as they sleep on the sofa.
The outside set for the Garage where Luke works is across the street from the car yard set where the salesman died, and can be seen in its undressed form as Olivia is leaving.
This episode reconnects Joshua Jackson and Mary Beth Peil who previously starred together on Dawson Creek.