Highlander - Season 4

McLoud bought a Celtic bracelet once given to the love of his mortal life, and after her tragic death, he buried it with her. He returns to Glenfinnan, Scotland, to return the bracelet to her grave and learns of several gruesome ritualistic killings based around Kanwulf, the one immortal who killed Mac's father. Naturally, Mac must get to the bottom of the killings and keep his head in the process.

Friends become enemies, and the past is revealed when Immortal Andrew Cord is gunned down and MacLeod discovers the sniper is Charlie DeSalvo, his good friend who used to run the dojo. Charlie, who left MacLeod to fight the good fight in the Balkans with his love, Maria Leonin, is after Cord, who murdered her. Dawson knows Cord as the man who saved his life in Vietnam after a mine explosion took his legs, and he begs MacLeod not to fight him. MacLeod agrees -- until Cord turns the tables and sets his sights on Charlie.

In an episode filled with danger and compassion, Richie encounters Mikey, a huge Immortal of limited mental development and a fascination with trains. Richie takes Mikey home to MacLeod, who warns him that caring for Mikey could be trouble. MacLeod remembers coming to the aid of a young Indian in trouble in Dakota Territory during 1868, when his help got the man killed. While MacLeod faces Tyler King, an Immortal who's coming after Mikey, Richie must find the maturity to take responsibility for Mikey's situation.

The past comes back to haunt Richie when he spies Mark Roszca, the street punk who killed Tessa and made him Immortal. Richie is determined to go after Roszca and avenge Tessa's death. Meanwhile, MacLeod is distracted by the return of an old Immortal enemy, Kanis -- a master of hounds who uses his pack of attack dogs to track, exhaust, and injure Immortals so he can easily take their heads. In a flashback to 1785 England, Kanis has his dogs hunting a young boy, and MacLeod kills one. This time, Kanis's prey is Duncan MacLeod.

MacLeod's old friend, Kit O'Brady, comes into town in search of a good race horse and a change of luck. MacLeod knew Kit back in Gold Rush San Francisco, when Kit ran the Double Eagle Saloon. Kit lost the Double Eagle to Amanda in a poker game and has blamed her ever since for his string of bad luck -- and he's vowed to kill her. When Amanda chooses to breeze back into MacLeod's life while Kit is there, MacLeod is hard pressed to keep them apart and to keep them from killing each other.

Running for his life from Immortal Terence Kincaid, Kenny runs straight into Anne Lindsey's emergency room. Stashing Kenny in the hospital chapel, Anne calls MacLeod for help. MacLeod agrees to harbor him for one night only, but when MacLeod gets him home, Kenny discovers his long-lost teacher there -- Amanda!

ER trauma surgeon Anne Lindsey responds to the call for help after an explosion devastates a subway station, but when a subsequent explosion rocks the station, Anne is trapped. MacLeod remembers WWII London where he and the woman he loved, reporter Diane Terrin, were trapped in a bombed air-raid shelter during the Blitz, running out of time and air. MacLeod is desperate to rescue Anne before he loses her like he lost Diane.

The Immortal Coltec is a Native American Hayoka—a shaman whose responsibility is to take evil into himself to protect his people. After the massacre of MacLeod's Indian family in 1872, Coltec saved MacLeod by taking in the evil and rage he felt. Since the death of his tribe, Coltec has become Hayoka to the world, protecting it from evil Immortals. But Coltec's capacity for evil isn't endless, and when he has killed one too many evil Immortals, he becomes the victim of a Dark Quickening. MacLeod must find a way to save Coltec without being drawn into the evil himself. But when MacLeod is forced to take his friend's head, he succumbs to the Dark Quickening himself. Then, Joe Dawson must stop him from taking Richie's head. Later, MacLeod boards a cargo ship heading for France.

Still under the influence of the Dark Quickening, MacLeod arrives in France and starts sowing havoc, leaving a trail of hate and destruction in his wake. In a flashback to 1917 France, Duncan is an ambulance driver, and his Immortal friend, Sean Burns, psychoanalyzes the battle-fatigue victims, discussing his calling with MacLeod. Meanwhile, both Methos and Sean Burns try to reach MacLeod. Methos despairs that he might have to fight his friend if he cannot reach him, but with Burns' unexpected influence, he has someone who might be able to break through. Methos finds MacLeod and discovers just how evil he has become when he tries to take Methos' head on holy ground. After MacLeod kills his good friend Sean, Methos realizes that the only way to save MacLeod may be to kill him.

In 1755, MacLeod made a promise in order to save the life of a young friend. It comes back to haunt him when Kassim, the Immortal to whom he made the promise, demands that MacLeod assassinate Hamad, the tyrannical dictator of a small Middle Eastern country. When his refusal results in a good man's death and puts Rachel MacLeod's life in jeopardy, MacLeod is torn between doing what he believes is right and keeping his promise.

Someone is again searching for the shards of the Methuselah Stone, once sought by the dangerous immortal, Luther. The Stone is a mystic talisman rumored to make a mortal immortal and an immortal invincible. 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 that the crystal may be part of the Methuselah Stone, 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.

When Gina and Robert de Valicourt met 300 years ago, even Gina's suitors, MacLeod and Fitzcairn, had to admit they were destined for each other. Each century, as Robert and Gina renewed their wedding vows before their friends and fellow Immortals, their love grew stronger. But now their marriage is on the rocks. MacLeod decides it's up to him to reunite the once-happy couple, and he enlists a very unwilling accomplice in his cunning plan - Methos.

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.