The two original series, the Primary and Secondary Phases, remastered by Dirk Maggs with vibrant sound and music and including a 55-minute feature programme, Douglas Adams's Guide tothe Hitchhiker's Guide to the Galaxy, and a fascinating 50-minute interview with Douglas Adams

Extended editions of the Tertiary, Quandary and Quintessential Phases, directed by Dirk Maggs and featuring over 11/2 hours of material not heard on BBC Radio 4

The concluding Hexagonal Phase, with a further 50 minutes of extra unbroadcast content

A special bonus disc featuring Douglas Adams's appearance on BBC Radio 4's Bookclub, in which he talks to James Naughtie and a group of readers about comedy, sci-fi, the creation of his characters and his influences

Grab your towel, pour yourself a Pan Galactic Gargle Blaster and get set for over 20 hours of unmissable radio adventure!