The book that Chloe reads to Trixie is Coraline by Neil Gaiman. The character of Lucifer as seen in the series was introduced by Gaiman in his comic book series The Sandman.
The paintings on the wall in Charlotte Richards office are of pomegranates. The pomegranate is believed to be the real fruit from the tree of knowledge by many scholars. Pomegranate seeds also feature prominently in the myth of Hades and Persephone.
This will be the first time D.B. Woodside and Charisma Carpenter have worked together on screen; although both actors had previously worked on Buffy the Vampire Slayer (1997). Charisma Carpenter left the show in 1999 to work on the spin off show Angel (1999), and D.B. Woodside came on to the show 2002 for its final season.
When they discover the body of the actor Lucifer admires, there is a poster titled "Body Bag 4," The same movie is prominently featured in True Romance (1993), in which they talked about making "Body Bag 3."
This is the second show Aimee Garcia and Charisma Carpenter have worked on together. The first was in Birthday (2002). This time Aimee Garcia is the series regular and Charisma Carpenter is the guest star, where in Angel Charisma Carpenter was the series regular and Aimee Garcia was the guest in the show.