S2·E4 The Darkness

A mortal named Pallin Wolf, one of the renegade Watchers who believes the Immortals must be eliminated, lures an Immortal to his house and kills him, getting the advantage by tricking him into a sealed room that is completely dark, then stalking him with night vision goggles. Meanwhile, a Gypsy fortuneteller they meet in a restaurant, Greta, warns Tessa that she is in danger. When Tessa is kidnapped by Wolf, MacLeod returns to Greta, asking for her help. But she's mostly a hustler, and not accustomed to getting actual visions, so the clues she is able to provide are meager. Finally, Mac finds Wolf's house, where Wolf is waiting for him. He meets Wolf in the dark room and all seems hopeless until he remembers a matchbook Greta gave him with her phone number in it. Lighting the matches, he regains the advantage and kills Wolf. However, as Tessa and Richie are heading for the car, a young junkie accosts them for money, and in an act of senseless violence, shoots them both. As Mac mourns,