Ep 6. Black Tower

In Highlander: The Series season 6 episode 6, titled Black Tower, we find our immortal protagonist Duncan MacLeod (Adrian Paul) heading to the peaceful countryside of Scotland. He's on his way to a romantic getaway with his girlfriend, Kristin Gilles (Valentine Pelka). Kristin is an immortal who has given up the fighting life to focus on her passion for gardening. However, their plans for a peaceful weekend are disrupted when Duncan starts having powerful visions. These visions lead him to a mysterious black tower in the distance, and he becomes inexplicably drawn to it.

As is often the case in the Highlander universe, there are other immortals on the prowl, and before long Duncan and Kristin find themselves face-to-face with one of them - a dark, menacing figure known as the Dark Quickening. This entity is a manifestation of darkness that can possess and corrupt immortals who have succumbed to their dark side, turning them into monstrous beings with no morals or empathy.

With the Dark Quickening quickly closing in on them, Duncan and Kristin are forced to team up with a group of mortals who are experts in ancient Scottish lore. Together, they delve into the secrets of the black tower, hoping to uncover its connection to the Dark Quickening and possibly find a way to stop it.

As the group journeys deeper into the tower, Duncan becomes increasingly aware of how much the Dark Quickening is affecting him. He starts experiencing powerful emotional swings, from uncontrollable anger to crushing sadness, which endanger the mission and his relationships with those around him. As the story progresses, we see Duncan struggling to hold onto his sanity, while the dark forces surrounding him threaten to destroy everything he holds dear.

One of the strengths of this episode is the way it explores the concept of immortality and the toll it takes on those who possess it. The immortals in Highlander are not invincible creatures but are as vulnerable to emotional damage as anyone else, and this episode does an excellent job of showing how the weight of their long lives can grind them down.

The episode is dark and atmospheric, with plenty of spooky visuals that will keep viewers on the edge of their seats. There is a sense of tension and foreboding that permeates every scene, backed up by an eerie musical score that perfectly captures the mood.

Overall, Black Tower is a gripping episode that explores the darker side of the Highlander universe, with strong performances by the cast and excellent direction. Fans of the show will not be disappointed, and newcomers may find themselves drawn into the show's universe thanks to the striking visuals and thrilling storytelling.