First episode with Lincoln Lee from this universe.
The Observer stands across the street from the team as they begin to investigate the suicide/survival.
The glyphs for this episode spell out: ERODE
This is the first episode Phillip Broyles and William Bell share dialogue. However, they never meet physically throughout the series.
The same reference to "Sesame Street" is also made by Rebecca Kibner, back in Momentum Deferred (2009) when she's talking with Walter and Peter in her house.