The Hitchhiker's Guide to the Galaxy

Arthur, Ford, Zaphod, Trillian and Marvin travel with the Heart of Gold to the legendary planet, Magrathea, the home of the planet builders. They land on the planet and set off to explore. Zaphod, Trillian and Ford explore beneath the surface, where they make a surprising discovery... Meanwhile, Arthur and Marvin are approached on the surface by Slartibartfast, who explains that the Earth was destroyed 5 minutes too early, and they intend to build a new one...

Arthur learns about Deep Thought, a computer built millions of years ago to discover the "Ultimate Answer", after 7 and a half million years, it had the answer: 42. So to decipher this answer, the builders of the computer commissioned a new, even larger computer to find the "Ultimate Question"; the Earth. It is discovered that Trillian's mice (the smartest creatures on Earth) were searching for the Ultimate Question, and they believe they can find the answer by first extracting Arthur's brain...

Arthur, Ford, Trillian and Zaphod are saved by the Galactic Police, and then knocked unconscious, when they wake up they find themselves at the Restaurant at the End of the Universe. They steal a totally black ship from the car park and go in to hyperspace, however, with the interior being completely black as well, the controls are illegible, and the ship is out of control and veering into a nearby sun!

Ford and Arthur dash to the escape pods, where they end up being teleported to a mysterious ship, "Ark B". Which they discover is a ship filled with middle-men trying to find a world to colonise, and the world they have chosen is Earth, 2 million years in the past. Arthur and Ford are now stuck on prehistoric Earth.