Highlander: The Series (1992)

Season 6: Episode 3

Now that his grandson, Carl, manages the bank, George Thomas can relax with his old friend, Duncan MacLeod. But the good life is cut short when George's car explodes in a ball of flames -- leaving MacLeod to find George's killer. The trail leads to Alex Raven, a beautiful Immortal with a taste for danger and a fifty-year-old promise to fulfill... no matter what the cost.