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

Lorsqu'on retrouve deux guetteurs assassinés par Kalas, Joe Dawson en conclut que celui-ci est à la recherche du légendaire Méthos, le «plus vieux» des Immortels. MacLeod sait que Kalas deviendrait assez puissant pour le vaincre. Kalas et MacLeod se mettent chacun en quête de Méthos.

Lorsqu'on retrouve deux guetteurs assassinés par Kalas, Joe Dawson en conclut que celui-ci est à la recherche du légendaire Méthos, le «plus vieux» des Immortels. MacLeod sait que Kalas deviendrait assez puissant pour le vaincre. Kalas et MacLeod se mettent chacun en quête de Méthos.

Methos, der angeblich älteste Unsterbliche, wird von Kalas gesucht. Duncan glaubt zunächst nicht an die Existenz Methos. Doch das ändert sich, als er den Historiker Adam kennen lernt.

Il malvagio Immortale Kalas vuole trovare Methos, il più vecchio Immortale del mondo, per ucciderlo ed acquistare così maggiore forza in modo da poter aver la certezza di sconfiggere MacLeod. Ma forse Methos è solo una leggenda.