Highlander S04E16 - Methuselah's Gift

Someone is again searching for the shards of the Methuselah Stone, once sought by the dangerous immortal, Luther. The Stone is a mystic talisman rumored to make a mortal immortal and an immortal invincible. When masked thugs try to take Amanda's head in her sleep and steal the crystal given to her long ago by Rebecca, Amanda and MacLeod investigate. They discover that the crystal may be part of the Methuselah Stone, and that the person willing to kill Amanda to get it may be-- Methos?