Synopsis by Hal Erickson
This episode is based on a mystery story penned by no less than Ellery Queen. When his son is mysteriously murdered, religious fanatic John Cooley (R.G. Armstrong) embarks upon a "mission from God" to wreak vengeance for the boy's death. Using a fragmentary clue found at the murder scene, Cooley heads to the small town of Northfield, where he holds the populace in a grip of terror. Hoping to prevent Cooley from destroying the town, Northfield sheriff Will Pearce (Dick York) sets about to solve the murder himself.