When aging janitor Harlan Williams is accidentally exposed to exotic chemicals in a lab explosion, he undergoes an extraordinary change, which the government wants to study at any cost. Soon, Harlan, his wife Gina, and the lab's security chief are on a cross-country race to evade a murderously effective federal agent.

This made-for-TV mini-series from the notorious horror writer centers upon a hapless old janitor who begins undergoing incredible physical changes after he is accidentally covered with experimental chemicals following a laboratory mishap. Now the government will stop at nothing to get him back.

Man has split the atom and created the ultimate weapon. But how could he have known he would also create Them!? The terror begins when a hard-nosed patrolman (James Whitmore) discovers a dazed child wandering in the New Mexico desert near a car and house trailer destroyed by a mysterious force. Whitmore next discovers a ransacked general store; its cash drawers are full but the sugar supply is missing. And on the floor lies a battered corpse containing...