"Highlander: The Series" is a fantasy television show that aired from 1992 to 1998. It follows the story of Duncan MacLeod, an immortal warrior who can only be killed by decapitation. The series explores themes of honor, friendship, and the struggle for survival among immortals, who are drawn into battles known as "The Game." Each episode typically features Duncan facing various adversaries, including other immortals, while also delving into his past and the history of his kind. The show is known for its action sequences, character development, and the iconic phrase, "There can be only one."