Synopsis by Hal Erickson
In the fourth episode of the six-part story "The Green Death," the Doctor (Jon Pertwee) has learned that the environment-unfriendly Global Chemical Planet is controlled by a huge computer named BOSS. Intending to take over the world, BOSS has linked itself with every other computer in existence. Aiding and abetting the electronic villain's scheme is a deadly new species of huge, infectious maggots, the spawn of Global's toxic waste. First telecast on June 9, 1973, "The Green Death, Episode 4" was written by Robert Sloman.