Elizabeth's tombstone will change throughout the series. In this 2nd chapter, it says "In heaven, you can dance like no one's watching."
Much like the book that Anna reads with her wine, the artist books by Todd S Palmer that she keeps in her attic are also created by the writers.
Anna's ex-husband is a Forensic Psychologist who Interviews Serial Killers. Cameron Britton, the Everpresent Handyman, is well-known for playing a Serial Killer in Mindhunter (2017), a show about the start of the science of Forensic Psychology.