Highlander: The Series - Season 6 Episode 3
Sins of the Father

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 Georges car explodes in a ball of flames -- leaving MacLeod to find Georges 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.