The Hitchhiker's Guide to the Galaxy a human-like alien writer for the eccentric, electronic travel guide "The Hitchhiker's Guide to the Galaxy", by hitchhiking onto a passing Vogon spacecraft. Following his rescue, Dent explores the galaxy with Prefect and encounters Trillian, another human who had been taken from Earth prior to its destruction by the President of the Galaxy, the two-headed Zaphod Beeblebrox, and the depressed Marvin, the Paranoid Android. Certain narrative details were changed between the various adaptations. The various versions follow the same basic plot but they are in many places mutually contradictory, as Adams rewrote the story substantially for each new adaptation. Throughout
Technology in The Hitchhiker's Guide to the Galaxy After Ford starts the Thinking Cap, Zaphod (who was very groggy from having his second head removed by force) immediately was able to walk straight and think smarter than usual, and ten minutes later he could still walk, but was back to his normal, over-the-top self. "The Hitchhiker's Guide to the Galaxy" states that a towel is the most important item a hitchhiker can have. It also mentions that "to know where one's towel is" means to be in control of one's own life. It describes the towel as a multipurpose tool which can be converted into such things as