In the conclusion of the four-part story "Terminus," the Doctor (Peter Davison) tries to wrest the TARDIS free from the space pattern of a disease-ridden space station -- and to avoid triggering a fuel dump that would result in "Event Two," aka the End of the Universe. With the help of a creature known as the Garm (R.J. Bell), the Doctor may well succeed in saving himself and his companions, including young Turlough (Mark Strickson), who may or may not still be determined to assassinate the Doctor on behalf of the Black Guardian (Valentine Dyall). First telecast on February 24, 1983, "Terminus, Episode 4" was written by Stephen Gallagher. ~ Hal Erickson, Rovi