Featuring Jon Pertwee as the Doctor, with Elisabeth Sladen as Sarah and Nicholas Courtney as the Brigadier. Originally released in 1993, this marks the reissue for the first time on CD, fitting seamlessly into television continuity between The Time Warrior and Invasion ofthe Dinosaurs. When a horrific and inexplicable death occurs at Space World, a new theme parkon Hampstead Heath, UNIT is called in to investigate. The Doctor is highly suspicious. Just who controls the Parakon Corporation, the shadowy organizationbehind the running of the park? What is "Experience Reality" and what are the limits of its awesome powers?