When two Watchers end up dead by Kalas' hand, Joe realizes that Kalas is looking for Methos, the mythical ""oldest Immortal."" MacLeod knows that, with Methos' quickening, Kalas would finally be strong enough to defeat him. Kalas and MacLeod race to be the first to find Methos. Meanwhile, Richie muscles his way onto a top level motorcycle racing team and the champion, Basil, starts to get nervous. Flashbacks are to Paris in the 1920s, when Kalas, then known as Antonio Neri, was the toast of the opera world. When Kalas threatens a young girl in MacLeod's protection, they fight. Kalas escapes, but not before MacLeod inflicts a throat wound that destroys Kalas' vocal chords and the singing that has been his life since the Middle Ages. Kalas nearly takes Methos in battle and, realizing that he will not be able to defeat Kalas, Methos offers his own head to MacLeod. MacLeod refuses and challenges Kalas on his own, nearly defeating him when the police arrive to send Kalas to prison for the dea

Amanda accidentally helps Kalas escape from prison by trying to do MacLeod a favor and kill Kalas for him. After an attempt on Maurice's life thwarted by MacLeod, Kalas kidnaps Amanda to use as bait against MacLeod, but Amanda manages to escape. Meanwhile, Christine Salzer, the widow of a Watcher killed by Kalas (in ""Methos"") decides to get her revenge on Immortals and Watchers alike by exposing their secret to the media. Dawson and Methos team up to try and talk Christine out of it, but she's determined to take a computer disk with the identities of all known Immortals and Watchers on it to a newspaper publisher. Dawson, desperate, tries to kill her outside the newspaper building, but is stopped by MacLeod and Methos. Christine enters the building and the Immortals and the Watcher know their lives are about to change forever.

As Christine tells her tale to the newspaper publisher, MacLeod and Amanda, knowing their world is about to end, finally admit they love each other. Kalas kills Christine and the publisher and steals the computer disk before they have a chance to spread the story. Kalas offers MacLeod a deal -- MacLeod offers up his head or the contents of the disk are made public. Dawson and the Watchers attempt to find Kalas, but this only results in more dead Watchers. Methos tries to talk MacLeod out of it, but MacLeod agrees to fight Kalas on top of the Eiffel Tower. Kalas is defeated and the resulting Quickening, amplified by the Tower, sends a power surge that disrupts every computer in the vicinity -- including Kalas'. The information on the disk is destroyed and Immortals and Watchers maintain their anonymity.

Nearly 350 years ago, MacLeod was the devoted lover of Kristin Gilles, a beautiful Immortal who taught him to be a gentleman. When he found another love, Kristin refused to let him go, killing his new lover. Now Kristin is sharing her bed with another new Immortal full of potential -- Richie. Methos, who knows MacLeod has never been able to kill Kristin because of his strict code of honor, has arrived in town to watch the fireworks as MacLeod tries to convince Richie that his new-found love is dangerous.

World famous pianist Claudia Jarsine has a secret that even she doesn't know -- she's destined to become Immortal. Immortal impresario Walter Graham, who has guided the careers of mortal greats like Shakespeare, sees his chance to shepherd Claudia's genius forever and kills her, triggering her latent Immortality -- against MacLeod's better judgment. Meanwhile, Methos has fallen for Alexa, a waitress at Joe's who has a secret of her own.

MacLeod arrives in France, leaving a trail of hate and destruction in his wake. Methos finds him and discovers just how evil MacLeod has become when he tries to take Methos' head on holy ground. After MacLeod kills another good friend, Methos realizes that the only way to save MacLeod may be to kill him.

When masked thugs try to take Amanda's head in her sleep and steal the crystal given to her long ago by Rebecca, Amanda and MacLeod investigate. They discover the the crystal may be part of the Methuselah Stone, a mystic talisman said to impart eternal life and invulnerability to the wearer and that the person willing to kill Amanda to get it may be -- Methos?

MacLeod's old friend Warren Cochrane is hiding a horrible secret he can't bear to remember. Realizing that an Immortal who won't remember what he is is soon a dead Immortal, MacLeod tries to help Warren by reminding him of the history they shared together, of their battles for Scotland's freedom, and of their mission to return Bonnie Prince Charlie to the throne. But MacLeod might have helped his friend more by letting the past stay buried.

Dawson's life is on the line when the Watchers try him on the charge of treason for his friendship with MacLeod. Watcher deaths have risen dramatically since Dawson first told MacLeod about the Watchers and the Tribunal is determined to punish Joe and stop the killing. MacLeod and Dawson argue his case, but even as the trial goes on, the Watcher killings continue.

Richie's found a new teacher: an Immortal who preaches a message of peace. An Immortal who believes that all Immortals can lay down their swords and live together as brothers. An Immortal who claims to be the oldest of their kind still alive -- Methos. Will laying down his sword in the name of peace mean Richie will lose his head? And what does this mean for the friend MacLeod already calls Methos?

In 1944, Ingrid Henning had the chance to kill Adolf Hitler and failed. She's been atoning for that failure ever since by killing dictators, tyrants, racists, and fascists who might have the potential to become as dangerous. MacLeod has a chance to stop her before she kills more mortals, but by stopping her, does MacLeod commit the same evil for which he's judged her guilty?

MacLeod knew him as Melvin Koren, a desperado who left a trail of death and fire across the Old West, but Cassandra remembers him as an evil far older. He is Kronos, leader of the Four Horsemen, mounted Bronze Age raiders who murdered, raped, and pillaged their way across two continents. Never was a band of Immortals more cruel or more feared. He destroyed Cassandra's people and she's been hunting him across the millenia. But Kronos has a different target now -- Methos.

One by one, Kronos is putting the Four Horsemen back together. Once they struck fear in the hearts of men with sword and axe. Today, their weapons of destruction are different, but their goal is the same: to bring mankind what it fears most, the Apocalypse. Only Duncan MacLeod stands between them and the end of the world.

After the Scottish massacre at the Battle of Culloden in 1746, Duncan MacLeod was a man possessed, obsessed, with killing the English bastards who had destroyed his people. Now Immortal Steven Keane has come to make MacLeod pay for his murderous crimes. Amanda urges MacLeod to take Keane's head and be done with it, but in his heart MacLeod knows that Keane is right -- he is a murderer -- and that Keane is judging him just like MacLeod has judged so many others.

Lord Byron, the brilliant Romantic poet, is alive and well and living the decadent life of a rock star. He lives life way over the edge and has taken some promising young musicians over the edge with him. When following in Byron's footsteps tragically ends the life of Dawson's protege, MacLeod is faced with a decision -- is the beauty and genius that is Byron worth the cost?

The dead are walking the streets of Paris. The forces of evil are coming. Is MacLeod being readied for some higher calling -- or is he simply losing his mind?

All bounty hunter Reagan Cole wanted was a holiday in Paris with Duncan MacLeod; what she gets is international intrigue, a hunky underwear model, and a terrorist with a million-dollar price on his head.

Methos and Joe Dawson join forces when past indiscretions threaten their lives-- and loved ones-- in the present. Morgan Walker has been nursing a grudge against Methos for two hundred years, and now he may finally get the chance to take his revenge... by kidnapping Joe's daughter.

The popular series lays down its sword after six seasons in this stirring finale, in which MacLeod makes the ultimate sacrifice to save the lives of Amanda and Joe Dawson... then reunites with old friend Hugh Fitzcairn, and gets a look at what the world-- and his friends' lives-- would be like without him.

Fitz died three hundred years ago... Horton has taken over the Watchers... Joe Dawson has been reduced to a bitter, penniless vagrant... Amanda is a black widow... and Methos has rejoined the Horsemen to avenge his fiance's death. If you think that's bad, just wait till you find out what's happened to Richie and Tessa.