X-Men Vol 1 28

"The Wail of the Banshee!"
	Writers Roy Thomas Pencilers Werner Roth Inkers Dick Ayers Letterers Artie Simek Editors Stan Lee

Appearing in "The Wail of the Banshee!"

Featured Characters:

Supporting Characters:

Adversaries:

Factor Three (First appearance)
- Banshee (First appearance)
- The Ogre (First appearance)

Other Characters:

Locations:

Items:

Vehicles:

This issue is reprinted in many other comics and books, see references for more info.^[1]
credits:
- Stan Lee Editor
- Roy Thomas Writer
- Werner Roth Artist
- Dick Ayers Inker
- Artie Simek Letterer
- Irving Forbush Noise-Maker

Cyclops notices a locked door in the basement - its the first time we see it, and its where the professor hides when he fakes his death and where the professor hides the Juggernaut.
Banshee was originally intended to be female by Roy Thomas, but the character was made male by an editorial decision. "Banshee" comes from the Gaelic "baen sidhe" (same pronunciation), which is a female spirit with a deadly wail.
According to Roy Thomas, Factor Three is supposed to be inspired by the early James Bond movies. Also, he says that on Page 15, Panel 1, he admits that it was accidental when Jean levitated a screwdriver, called it pliers, and Beast calling Jean a credit to her gender. He accidentally typed pliers instead of screwdriver, and it generated some negetive and (somehow) positive feedback to Roy.