The Hitchhiker's Guide to the Galaxy (novel) productions in the late 1970s. Davies himself appears as Prosser. This edition is out of print – Adams bought up many remainder copies and sold them, autographed, on his website. There have been three audiobook recordings of the novel. The first was an abridged edition (), recorded in the mid-1980s by Stephen Moore, best known for playing the voice of Marvin the Paranoid Android in the radio series, LP adaptations and in the TV series. In 1990, Adams himself recorded an unabridged edition for Dove Audiobooks (), later re-released by New Millennium Audio () in the United States and available
The Hitchhiker's Guide to the Galaxy (radio series) discussed the new series, directed and co-produced the radio adaptation as well as adaptations of the remaining "Hitchhiker's Guide" novels "So Long, and Thanks for All the Fish" and "Mostly Harmless". These became the third, fourth and fifth radio series, transmitted in 2004 and 2005. A sixth series, adapting Eoin Colfer's sixth part in the "trilogy", "And Another Thing..." was broadcast in March 2018. Douglas Adams had contributed comedy sketches for BBC radio programmes produced by Simon Brett (including "The Burkiss Way" and "Week Ending"), and was asked to pitch a radio sitcom in February 1977. Adams initially pitched a