(written from a Production point of view)
This category contains articles that have material referenced in an appendix of an in-universe article that is from scripts, writers' bibles, etc, but did not make the final edits. It also contains material that was filmed and later presented as deleted scenes, but never fully reintegrated into canon.
Pages in category "Deleted and unused material in background"
The following 200 pages are in this category, out of 214 total.