As one of the immortals, entities who have waged a war between good and evil for centuries, a 400-year-old Scotsman fights for his destiny.
S01:E01 - The Gathering
Immortal Duncan MacLeod, cousin of Connor MacLeod, cannot stay out of the Immortal conflict with his love Tessa after he is challenged by the evil Immortal Slan Quince.
S01:E02 - Innocent Man
A homeless mortal is wrongfully accused of the murder of an Immortal after investigating a bizarre thunderstorm surrounding a cabin
S01:E03 - The Road Not Taken
A deadly herbal drug takes the life of Richie's friend, and MacLeod suspects the source of the drug is another Immortal, Kiem Sun.
S01:E04 - Bad Day in Building A
While visiting the courthouse to clear up Tessa's traffic tickets, MacLeod, Tessa, and Richie are among a group that is taken hostage.
S01:E05 - Free Fall
Felicia Martins throws herself to her death, only to realize that she is Immortal. She seeks out Duncan, and becomes involved with Richie.
S01:E06 - Deadly Medicine
MacLeod is struck and "killed" by a speeding automobile. When he revives in the hospital, he attracts the attention of a deranged doctor.
S01:E07 - Mountain Men
When Tessa is taken by a band of Survivalists who live off the land in the Pacific Northwest, MacLeod must call on all of his own skills.
S01:E08 - Revenge Is Sweet
Seeking revenge for the apparent death of her lover, Walter Reinhardt, Rebecca Lord toys with MacLeod before she attempts to kill.
S01:E09 - The Sea Witch
Richie tries to protect an old girlfriend from drug dealers led by Immortal Voshin, whom MacLeod knows from an adventure during WWII.
S01:E10 - Eyewitness
Tessa claims to see a woman murdered, but there's no body and only Duncan believes her.
S01:E11 - Family Tree
Richie tries to track down his parents and runs afoul of a female crime boss. Duncan comes to his help while pondering his own life among the MacLeods.
S01:E12 - See No Evil
When a serial killer preys on beautiful blonde women, Duncan recognizes the pattern as that of an Immortal he killed 80 years ago.
S01:E13 - Band of Brothers
Warning comes from MacLeod's old friend Darius that Grayson, a former protégé, is stalking Darius' other students - among them, possibly, MacLeod.
S01:E14 - For Evil's Sake
Kuyler, an Immortal assassin, has run across Duncan in the past and their paths cross again when Kuyler employs a band of killer mimes.
S01:E15 - For Tomorrow We Die
MacLeod encounters Xavier St. Cloud, a ruthless Immortal who uses poison gas to commit his robberies and kills anyone who gets in his path.
S01:E16 - The Beast Below
A mysterious death at the Paris Opera re-acquaints Duncan with one of the strangest Immortals he has met in his many travels over the centuries.
S01:E17 - Saving Grace
Grace Chandel has been a good Immortal, whose only weakness is Immortal Carlo Sendaro, a former lover obsessed with her.
S01:E18 - The Lady and the Tiger
A day at the circus reunites MacLeod with a former lover, the Immortal femme fatale, Amanda, who has always meant big trouble for him.
S01:E19 - Avenging Angel
A deluded new Immortal believes that he has been chosen by God to crusade against evil, and one of his target's is an old friend of Tessa's.
S01:E20 - Eye of the Beholder
Richie becomes involved with a woman who is a model for another Immortal, Gabriel Piton, who is an old friend of Duncan's.
S01:E21 - Nowhere to Run
When the stepdaughter of an Immortal is raped, he goes after the young man. Duncan, a guest in the home of the accused boy's father, feels he must protect the family from this menace.
S01:E22 - The Hunters
Immortals are mysteriously being killed... and Darius is their next target.