It was also the series's first exploits with computer-generated imagery, a relatively limited technology at the time. An all-computer animated opening titles sequence was introduced with this story, along with a new arrangement of the theme tune by Keff McCulloch, an appropriately electronic rendition composed entirely on a Prophet 5 Synthesiser. The logo of the series was also changed into a three-dimensionally animated part of the title sequence, and became the series logo that would stay in use until the early 1990s.