The room that Harrison was told to clean is 237 which is a reference to the movie The Shining.
Dexter uses the alias 'Dr. Patrick Bateman' to procure M99 (Etorphine) from a veterinarian. The name is a sly nod to American Psycho, where Patrick Bateman (played by Christian Bale) is a Wall Street executive who conceals his psychopathic alter ego and serial killer instincts behind a polished public persona.
On July 26, 2024, at San Diego Comic-Con during the Dexter: Original Sin panel, a sequel series to Dexter: New Blood titled as Dexter: Resurrection was announced. It is developed by Clyde Phillips who is also serving as an executive producer and the showrunner.
Homicide detective Claudette uses headphones and music to mentally reconstruct murder scenes-a method reminiscent of FBI Agent Paul Smecker (played by Willem Dafoe) in The Boondock Saints, who also uses headphones and music to immerse himself in the psychology of the crime.
The hospital Dexter Morgan is admitted to, is the same location as the jail Frank Castle was detained at in The Punisher season 2 episode 3.