: Most of the episode takes place within the claustrophobic confines of the GeoFront, focusing on the "middle generation" characters (Ritsuko and Misato).

: Ireul's name and behavior are references to biological and computer science concepts, specifically the Pribnow Box (a DNA sequence) and Michael Crichton's The Andromeda Strain . Episode Significance

: The episode provides deep insight into Ritsuko's complicated relationship with her mother, highlighting her struggle to understand Naoko as a "woman" (represented by Casper), which is ultimately what allows her to save the base.

: Ireul attempts to initiate NERV's self-destruct sequence, which requires a unanimous vote from all three Magi.

: The writing "Ikari, you jerk!" found inside Casper hints at the hidden personal conflicts between Gendo Ikari and the Akagi family that culminate later in the series.

: Initially mistaken for corrosion, the Angel is actually a colony of microscopic entities that act as a biological computer circuit. It rapidly evolves, hacking into NERV’s computer network and taking control of two of the three Magi supercomputers (Melchior and Balthasar).