The sixth season of the French/Canadian drama/adventure television series Highlander began airing 5 October 1997 and finished on 16 May 1998. It was the final season of the program. The series follows the adventures of Duncan MacLeod, a 400-year-old Immortal who can only die if he is beheaded. The ongoing battle between Immortals is known as the Game.

Although season five was meant to be the final season of the show, the show was renewed for a sixth season. Production began in July and ended in December. When funding finally was announced, Adrian Paul was working on Highlander: Endgame and said he’d only be available for half the season or eleven episodes. Peter Wingfield, Jim Byrnes, and Elizabeth Gracen were contracted to fill out the season. However, Wingfield and Gracen had other commitments that prevented them from being available for filming until November 1997. The series began filming in Paris in the summer and the producers had been approached about doing a spin-off series, which would center on a female immortal (which later became Highlander: The Raven). A number of "spec" scripts for the new series were filmed as episodes to fill out the season, but funding was again cut and only thirteen episodes were filmed. Duncan does not appear in two episodes, "Two of Hearts" (which doesn't feature any of the main cast) and "Indiscretions", which was the last episode filmed for the series, but was shown before the finale two-parter, "To Be" and "Not To Be".