Xander researches demons in Tobin's Spirit Guide, a fictional book originally from Ghostbusters (1984). It previously appeared in Restless (2000).
Jeff Kober (the warlock Rack) previously played Zachary Kralik, the psychopathic vampire whom the Watchers Council set on Buffy as a test, in Helpless (1999).
This line was cut due to length:
- Amy: "I want to have fun, Willow. I've been in a cage."
- Willow: "There was a little ball. And you seemed to enjoy playing with those cardboard toilet paper rolls."
- Amy: "As cages go, it was fine. But I was still confined. I've got lost time to make up and if people don't like it, screw them."