Oliver Crangle and Rod Serling in “Four O'Clock”

Four o' clock, Pete. That's when we'll make it occur. We'll make it occur at four o'clock. At that moment, at that precise moment, we shall...destroy evil. This is both my charge and my obligation, Pete: to destroy evil. And we shall do it at four o'clock. I'm not quite sure of the method yet, but that will come to me. It will come to me assuredly and it will be...a revelation. It will be the exploration of immorality, the exordium of the end. Four o'clock, Pete. That's when we'll make it happen, Pete, whatever form I choose. Four o'clock.

Rod Serling

That's Oliver Crangle, a dealer in petulance and poison. He's rather arbitrarily chosen four o'clock as his personal Gotterdammerung, and we are about to watch the metamorphosis of a twisted fanatic, poisoned by the gangrene of prejudice, to the status of avenging angel, upright and omniscient, dedicated and fearsome. Whatever your clocks say, it's four o'clock - and wherever you are, it happens to be the Twilight Zone.