[1] It was co-produced by Rysher Distribution in the United States, Gaumont Television in France, Reteitalia in Italy, RTL Plus in Germany, and Amuse Video in Japan.

In the final episode of season 5, "Archangel", the character of Richie Ryan was killed off and the supernatural demon Ahriman introduced into the storyline.

Of the 13 episodes of season six, two did not feature MacLeod, while in some he appeared in cameos: the producers were experimenting with introducing a new female Immortal character for a spin-off series.

In the end, there can be only one.This narration was slightly changed in the show's seventh episode, "Mountain Men" (again by Duncan): I was born four hundred years ago in the Highlands of Scotland.

One night, a young street punk called Richie Ryan breaks into the shop whilst they are celebrating Tessa's birthday but is caught by MacLeod, who threatens to cut off his head with a sword.

Convinced MacLeod is the gas poisoner, LeBrun tries to run him in whilst Duncan has to stop Xavier from gassing an exhibition Tessa is organizing.

In "The Lady and The Tiger" we met the unprincipled cat-burglar with a passion for circuses, robbery, and 400-year-old Scotsmen, here trying to set up MacLeod so that the Immortal thief she had double-crossed, Zachary Blaine, would not take her head.

When these mortals come for Duncan, he is ready and follows them back to their hideout, rescuing Fitz, who is about to be guillotined and confronting their leader, a wild-eyed fanatic who wants to destroy all Immortals.

This season opened with a new title sequence and a mysterious voice over explaining who Duncan MacLeod is and giving a quick summary of the Rules of the Game.

When MacLeod chases down two men watching from across the street, Dawson follows and tells Duncan that he is his Watcher, one of a secret society of mortals who observe and record the history of the Immortals, but never interfere.

He refuses to believe MacLeod's assertion that Darius was murdered by mortals, but is forced to when the leader of the killers is revealed to be his own brother-in-law, James Horton.

Gregor Powers has become a photographer but has lost touch with his humanity, pushing his feelings for others away to avoid the recurring pain of loss ("Studies In Light").

Duncan helps him to learn to value his life and the gift of his Immortality, whilst watching his own former lover, Linda Plager, who is mortal, die of old age and infirmity.

An uneasy peace is struck between Watcher and Immortal, as the terrible truth dawns – Michael is Quenten Barnes, the two sides of his personality fragmented into a schizophrenic existence.

Overjoyed, she accepts and, as they plan the wedding, Mac is lured from the shop by a group of Watchers, whose leader, Pallin Wolf, stuns Richie and kidnaps Tessa.

Using her as a lure, he entices MacLeod to his home, where he has a lightless room in which he hunts and kills Immortals, using a nightscope to see his prey (a la "Silence Of The Lambs").

Rather than tell Anne the truth, especially with Kalas at large, Duncan leaves Seacouver, arranging for Maurice to buy back the barge in Paris.

After Kalas kills one of the Watchers' historians, Donald Salzer, Dawson sends Duncan to a researcher on the Methos Chronicle, Adam Pierson.

(this marked Adrian Paul’s directorial debut in the series) The episode that followed saw the final guest appearance of Phillip Akin as Charlie DeSalvo who was killed by immortal Andrew Cord in Brothers in Arms.

But mid season saw Duncan like never before as an evil immortal after being affected by the Dark Quickening which corrupts him leading him to turn on his friends (Richie and Joe).

Believing that MacLeod is responsible for the slaughter of the Watchers, Jack Shapiro, their head, orders his death and, at the beginning of "One Minute To Midnight", Duncan is trying to survive their manhunt.

The two Immortals work out their differences and, now acting as equals, it is Duncan who asks Richie to stand aside as he avenges his humiliation at Clay's hands when they first met and takes his head.

[4] Christopher Lambert, who had then starred in the first two Highlander movies, had previously worked with French leading entertainment conglomerate Gaumont's president Christian Charret.

[4] Highlander was one of the first projects developed by Gaumont's television branch opened in 1992 and one of its financial backers was the French bank Credit du Nord.

[7] The French leading production company Gaumont Television bought the rights to the series to have it produced in syndication in America with a local crew, a ground-breaking move at the time.

[8] The show was co-produced in syndication by international partners including Gaumont, RTL Plus (Germany), Rysher Distribution (United States), Reteitalia Productions (Italy), Amuse Video (Japan)[3] and TF1 (France).

"[37] Carlo Cavagna of About Film criticized the series, saying that it consisted of "pedestrian one-hour confrontations pitting Duncan MacLeod against one overacting nefarious immortal after another, each a pale imitation of Clancy Brown's delicious overarching villainy in the first film" and felt that the series featured "a wide array of unappealing supporting characters" and that "the writers didn't know what to do with the Highlander concept.

The candidates introduced were Alex Raven (Dara Tomanovich), Kyra (Alice Evans), Katya (Justina Vail), and Reagan Cole (Sandra Hess).

According to behind the scene interviews and Highlander: The Complete Watcher's Guide, fan reaction was largely negative or apathetic concerning these original characters.

The Big Finish audio plays released in 2009 likewise do not reference the events of Highlander: The Source nor indicate that the story and its version of Earth are in Duncan's near future.