Immortals age normally until their first 'death', then stop abruptly.
One (Kenny) has been stuck at the age of ten for 800 years, allowed to
look but sadly never old enough to touch - or stay up late (C7, 'The
Lamb'; D6, 'Reunion').
An ancient demon who Duncan is fated to meet from the moment he's
born (E18, 'Archangel'). Unfortunately for the Highlander, defeating Ahriman - who appears as enemies from Mac's past, allowing for the
likes of Horton and Kronos to make reappearances despite the fact that
they're dead - will only come at a cost (F1, 'Avatar';
Amanda is at once both
lover and tormentor of Duncan. Born in the 9th Century and tutored by
Rebecca Horne (B19, 'Legacy'), Amanda is a frequent visitor to Duncan's
dojo or barge, but rarely stays long. She's also so popular with other
Immortals they go out of their way to track her down (see
O and Z). She was also so
popular with TV execs they gave her her own short-lived series,
Highlander: The Raven.
Amanda's constant companion in Toronto,
fully aware of her past, and happy to act as confidante, housekeeper,
financial planner and general dogsbody. We discover Lucy's back-story,
including her marriage to an Immortal, in
R10, 'Passion Play'.
All Immortals give off a 'buzz' that betrays their
presence to other Immortals close by. This not only makes it
impossible for them to sneak up on each other, but probably causes
some serious headaches when a large group convene. No wonder they're
testy around each other...
Yes, the Lord Byron is an Immortal, and friend of
Methos. In 1997 he's a rock singer, but his obsession with fame leads
to a final confrontation with Duncan. As he himself once said, "All
tragedies are finished by a death." His, in this case. (E17,
The Modern Prometheus)