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 Magrathean answerphone message is played by Simon Jones, who plays Arthur in both the TV series and the radio 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: When Ford and Arthur are in the pub at the beginning, in some shots there is a middle-aged woman at the left side of the screen looking at them. She played Trillian on stage, though was cast without anyone knowing this fact.
Trivia: The logo of Apple Computers can be seen just above Deep Thought's eye. Douglas Adams bought the first two Apple MacIntosh computers sold in the U.K. and remained a devoted Mac user for the rest of his life.
Trivia: The Marvin featured in the 1981 BBC television show can be seen in several shots in the scene in the Vogon Bureaucracy. Arthur does a double take as he passes 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.
Trivia: The message from ancient Magrathea was designed so that Simon Jones' head will appear in 3-D if the viewer happens to have a pair of old 3-D glasses on hand. (Stated on the DVD commentary track.)