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 adaptation in front of a live audience, featuring many members of the original cast including Stephen Moore, Susan Sheridan, Mark Wing-Davey, Simon Jones and Geoff McGivern, with John Lloyd as the book. The adaptation was adapted by Dirk Maggs primarily from Fit the First, including material from the books and later radio Fits as well as some new jokes. It formed part of Radio 4's "Character Invasion" series. The first four radio episodes were adapted for a new double LP, also entitled "The Hitchhiker's Guide to the Galaxy" (appended with "Part One" for the subsequent Canadian release), first by mail-order