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
The Hitchhiker's Guide to the Galaxy (radio series) the other characters. He made this character an alien and, remembering an idea he supposedly had had while lying drunk in a field in Innsbruck, Austria in 1971, decided that this character would be a "roving reporter" for "The Hitchhiker's Guide to the Galaxy," a pan-galactic encyclopaedia and travel guide. Recollections by his friends at the time indicate that Adams first spoke of the idea of "hitchhiking around the galaxy" while on holiday in Greece in 1973. As the first episode's writing progressed, the "Guide" became the central focus of his story, and Adams decided to base the whole series