In the third episode of the four-part story "The Sun Makers," the Doctor (Tom Baker) has been exposed to the fear-inducing PCM gas which holds the human laborers on the planet Pluto in a state of enforced servitude. Fortunately, the Doctor and Leela (Louise Jameson) are rescued by a resistance movement, dedicated to toppling the ruling Usurians from power. This, of course, puts the two time travelers on top of the "hit list" of Pluto's despotic human leader, Gatherer Hade (Richard Leech). First telecast December 10, 1977, "The Sun Makers, Episode 3" was written by Robert Holmes. ~ Hal Erickson, Rovi