In the conclusion of the four-part story "Time and the Rani," the Doctor (Sylvester McCoy) frees the reptilian residents of the planet Lakertya, then prepares himself for a final showdown with the Rani (Kate O'Mara), whose time-manipulating device could result in the end of the planet, if not the entire universe. The explosive climax takes place on an asteroid hovering high over Lakertya, a triumph of "making a lot out of a little" for the series' artistic designer Geoff Powell. Originally shown on September 28, 1987, "Time and the Rani, Episode 4" was written by Pip and Jane Baker. ~ Hal Erickson, Rovi