Trivia: At the very end of the film, when the group uses the Improbability Drive to go to the Restaurant at the End of the Universe, there are a lot of images that flash onto the screen when the drive is activated, so in the other parts of the film. In this case, the very last image shown is the face of Douglas Adams, the creator of the Hitchhiker series.
Trivia: The leader of the demolition crew that comes to tear down Arthur's house has an Asian appearance, a vaguely Mongolian mustache and a round hat. He is straight from the book, where the character is a descendant of Ghengis Khan. He hates his life and has visions of hordes of Mongols laughing at him.
Trivia: As they enter the temple of the Jatravartid people of Viltvoldle Six, at the base of the stairs is a "perfect recreation of Douglas Adam's nose" (DVD commentary) modeled from a cyber-scan of this head that had been previously created for a game and used in the film as an homage to him following his death prior to the completion of the film.