The glyphs from this episode spell out: BRIDGE
In this episode, one pivotal character is named "Verona" and another character takes a drug that makes him appear to be dead but which really only knocks him out for awhile. Both of these are references to William Shakespeare's play "Romeo and Juliet": the play takes place in Verona, and Juliet takes a drug that makes her only appear to be dead.
During the bridge scene, a second FBI vehicle arrives, with a camera emphasis on the license plate, "1 C3P0 1", an apparent reference to Star Wars.
Also in the bridge scene, the FBI vehicle carrying Olivia, Peter and Walter has the license plate number "1 R2D2 1"
The Observer is standing in line at the bank when Thomas Newton walks up to the teller.