 Detective Thompson, representing the law, is seldom of any help.Meanwhile, the estate's fabled "Green Archer", a masked, leotard-clad marksman, steals silently through Garr Castle and the estate grounds, confounding the enemy forces.This serial is an example of a fifteen-episode production that could have been rented for a twelve-episode run, as three episodes use an entirely self-contained subplot concerning the theft of a synthetic radium formula.