Over the past few weeks, I've come across several people who have asked about the Highlander/Immortal fandom. With that in mind, I thought it would be a good idea to post the fundamental premises of Immortal!canon for reference.

Note: This is strictly based on the Panzer/Davis canon and does not include anything in play on LiveJournal.

Basically, the main canon points are:
1) Immortality is triggered by a violent death (battle, car accident, gun shots, etc).
2) Unless and until they die violently, they are considered "normal," but still infertile. They age, get scars, can suffer broken bones, etc. Once they suffer their First Death, they heal rapidly from wounds, and cease to age.
3) Immortals can't have kids & are found as infants/young children.
4) The older they are, the quicker they heal.
5) They can only stay dead by decapitation.
6) Said decapitation triggers a Quickening.
7) Because of the knowledge gained in said Quickening, a lot of Immortals play The Game. There is also a Prize involved, but no one knows what it is. Conjecture has it that it is the sum of all Immortal knowledge. Hence, the mantra: There Can Be Only One.
8) Rules of The Game.
    A) No fighting on hallowed/holy ground.
    B) No fighting in front of mortals.
    C) Single one-on-one bladed combat.
9) Only an Immortal can absorb the knowledge passed on by a Quickening. If killed by a mortal, the Quickening is lost.
10) There is a secret society called Watchers whose main objective is to watch and record the lives of Immortals.
11) There is also a group of radicals called Hunters who think Immortals are an abomination of nature and are trying to wipe them out. Their leader, James Horton, was killed twice by Duncan MacLeod.

More Reading Material:
Immortals
Highlander Fandom

Cross-posted to her_champion