The Outer Limits 1963 S1 E30 Production And Decay Of Strange Particles

While experimenting on subatomic particles, physics researchers start a chain reaction that seemingly controls the researchers themselves. Scientist after scientist is consumed, turned into nuclear 'zombies' by what seems to be a form of sentient particle from another dimension. The reaction grows towards a terrible climax. The survivors fear they may be powerless to stop it. Just as the ever-expanding particles are about to engulf the lab and explode into an atomic cataclysm that could destroy the world, the head of the research facility calculates a formula that reverses the effects of the reaction, incorporates a random element, and neutralizes the new lifeform.