2001 left many questions unanswered. The filmÆs ending was totally mysterious. ClarkeÆs novelisation of the film gave an interpretation of what might have been happening, but the options were left open for the future. It wasnÆt until 1982 that Clarke came up with a development of the story: 2010: Odyssey Two (filmed in 1984 by Peter Hyams). The destination of the Discovery spacecraft has changed from Saturn to Jupiter, but never mind û an expedition follows to find out what happens and comes up against a super monolith, HAL and the transformed Bowman. Having got into the swing of sequels, Clarke followed on swiftly with 2061 in 1987. With the return of HalleyÆs Comet and the implications of JupiterÆs conversion into a mini-sun examined, 2061 brings back HAL and Bowman once more. The technical details of ClarkeÆs future continue to be refined with, for instance, cold fusion drives for the ships. This was another case of Clarke getting in before the scientists, as the cold fusion idea came into popular view in 1987, though it proved not to have much future in the following decade. As one reviewer (David Pringle) puts it, the best thing with 2061 is to "forget the characters, enjoy the vistas".