Basically an evil cabal of criminals known as the Skull tries to use Lucas as an unwilling assassin against a local sheriff with Mark's life hanging in the balance. I see this as a spiritual contest between an almost satanic entity (represented by the seemingly invincible Holt Coyle) and the way he tries to twist the virtuous Lucas McCain and bend him to his will. The greatness of this episode is wondering how good can prevail and that only adds to the tension.
Review of Skull
