In the conclusion of the four-part story "Paradise Towers," the Doctor (Sylvester McCoy) and Mel (Bonnie Langford) remain at the mercy of the Great Architect Kroagnon, the literal "brains" behind all the crime and carnage at the once-magnificent Paradise Towers apartment complex. Unfortunately, there seems to be no escape from Kroagnon's murderous henchman, the Chief Caretaker (Richard Briers). The Doctor's only hope is to unite the complex's various warring factions -- the Rezzies, the Kangs -- against the villains. Written by Stephen Wyatt, "Paradise Towers, Episode 4" first aired on October 26, 1987. ~ Hal Erickson, Rovi