The Hitchhiker's Guide to the Galaxy
This is the original and in many ways the best of Hitchhikers. It shares many excellent moments with the book and especially the TV series but what is great about this version is the extra material. Too few people know about the "shoe event horizon", "the problem of Lintila", and "a cup held in mid-air by art". If you like Hitchhikers then do make an effort to get hold of this.
