One night -- it happened to be the 5th of September -- Kubrick, his wife Christiana, my wife Maruja and I were dining in London at the White Elephant Club (the Kubricks were living temporarily at the nearby Dorchester Hotel). Suddenly, he asked me what my reaction would be if he were to substitute Saturn for Jupiter as the target of the space-ship Discovery expedition. I said something like, "Isn't it a bit late to make such a change?" He persisted, pointing out the beauty of the Saturnian ring system and the spectacular visual effect of the Discovery 's travelling near or even through it. Would I do some investigation and prepare a memo outlining the latest knowledge of Saturn, its rings, and its moons, he asked? And would I focus on anything that seemed out of the ordinary, something intriguing and unexplainable that Arthur Clarke might weave into a revised screenplay?
I prepared the memo, Kubrick was delighted, and Clarke backed the change with great enthusiasm. He brilliantly wrote Jupiter out and Saturn in. Everyone was happy.
Except for Wally Veevers, Doug Trumbull and others in the Special Effects Department. Despite their wizardry, they felt uncomfortable with the thought of having to accommodate the Discovery's moving within the Saturnian ring system. On top of all their problems, they were not in the mood to tackle a new one that might prove intractable. Anyway, they were all under severe time restraints on myriad other parts of the film. Special effects carried the day as far as the motion picture was concerned. But Clarke was so delighted with Saturn that he maintained it as the target planet in the novel version released shortly after 2001 eventually premiered in Apri~ 1968.