Dirk Gently’s Holistic Detective Agency

Broadcast on BBC Radio 4
Written by Douglas Adams, Dirk Maggs

The first series began on 3 October 2007 and features Harry Enfield as Dirk, Billy Boyd as Richard, Olivia Colman as Janice, Jim Carter as Gilks, Andrew Sachs as Reg, Felicity Montagu as Susan, Robert Duncan as Gordon, Toby Longworth as the Monk, Michael Fenton Stevens as Michael, Andrew Secombe, Jon Glover, Jeffrey Holland, Wayne Forester and Tamsin Heatley.

The script for Dirk Gently's Holistic Detective Agency was written by Dirk Maggs, who also directs, and John Langdon. The show was produced by Maggs and Jo Wheeler. As with the previous Hitchhiker's series, the CD version features greatly expanded episodes. There are a number of structural and detail differences between the radio adaptation and the book, mostly to aid the comprehension of the story when split into six half-hour episodes.