On the wall of the circulation office in the library is a portrait of former First Lady Laura Bush who has a master's degree in library science.
Hallucination Kady mentions to Margo, that she has four-octave range. Jade Tailor, who plays Kady, is a trained singer and has a four-octave range singing voice in real-life.
When hallucinating her friends, Margo mentions the they each represent something for her: her id (Eliot), her lost innocence (Fen), her guilt (Josh), her inadequacy (Kady) and her wisdom (Fogg).
In the books Margo (Janet as her character is known in the books) had the power of temperature manipulation. She used that power to create ice axeheads on the broken staff of the Foremost in the Wandering Desert.
Brian Markinson (Everett) and Magda Apanowicz (Woman from the Bar) have both appeared in the TV show, Continuum (2012) playing Inspector Dillon and Emily respectively.