Each episode or novel is given a rating from 1 to 10 -- 1 being purest tripe, 10 being perfection.
The list (which is divided by season) assumes a familiarity with the series and an ability to recognize episodes by title. However, I realize that not everyone remembers titles, and sometimes titles are confusing (for example, I have a hell of a time keeping "Shadows" and "The Darkness" straight, since the titles are interchangably applicable). To facilitate matters, I've included links to the episode summaries on the Official Highlander Site at each episode listing.
I've also included a ranking page that lists the episodes from best to worst, which can be used as a must-see/must-avoid guide (or, at least, a let's-see-what-the-pattern-of-what-Keith-likes-is guide...).
Onward...

Appearances | Bibliography | Biography | Bleacher Creature Feature | Blizzard Games fiction | Buffy the Vampire Slayer fiction | Commentary | Covers and other artwork | Dead Kitchen Radio and The Bronx Bongo | Doctor Who fiction | Dragon Precinct | Fanfiction | Farscape fiction | Gene Roddenberry's Andromeda fiction | Gloat page | Imaginings: An Anthology of Long Short Fiction | KRAD Fan Club | Links | Marvel novels | OtherWere | Pictures | Star Trek fiction | Stories and story & novel excerpts | Urban Nightmares | Young Hercules fiction