Methos is a fictional character from the Highlander universe - the film series, the television show Highlander: The Series, and several fiction books. He is an Immortal. He is portrayed by actor Peter Wingfield in both series and the movies. Methos, as one of the The Four Horsemen, represented death.
Methos was first introduced in the Highlander episode "Methos". It was originally planned to have him die at the end of the two-parter “Finalé” episode, but the writers saw potential in the character and kept him.
Read more about Methos: Highlander: The Series, Other Appearances, Personality, Professional Degrees and Credentials, Friends and Relationships, Watchers, Methos in The Game, Appearances