The fourth radio series The Hitchhiker's Guide to the Galaxy: Quandary Phase, was based on So Long, and Thanks For All the Fish.

Broadcast on: 3 May 2005 - 24 May 2005

Cast:

    * The Book: William Franklyn
    * The Book's "Update" voice (uncredited): Rula Lenska
    * Arthur Dent: Simon Jones
    * Ford Prefect: Geoffrey McGivern
    * Rob McKenna: Bill Paterson
    * Fenchurch (Fenny): Jane Horrocks
    * Barman: Arthur Smith
    * Russell: Rupert Degas
    * Vogon Guard (and Alien Teaser, uncredited): Bob Golding
    * Stewardess: Alison Pettitt
    * Hooker: Fiona Carew
    * Vogon Helmsman: Michael Cule
    * Evil-looking bird/Canis Pontiff: Chris Emmett
    * Vogon Captain: Toby Longworth
    * Announcer: John Marsh
    * Raffle Woman: June Whitfield
    * BT Operator/Barmaid/News Anchor 2: Ann Bryson
    * Jim (Bartender)/News Anchor 1: Simon Greenall
    * Speaking Clock: Brian Cobby
    * Ecological Man/Zirzla Leader: David Dixon
    * Arthur's BBC Boss: Geoffrey Perkins
    * Murray Bost Henson: Stephen Fry
    * East River Creature: Jackie Mason
    * Vogon Councillor: Dominic Hawksley
    * Steward: Simon Greenall
    * Mrs Kapelsen: Margaret Robertson
    * Vogon Clerk: Michael Cule
    * Prostetnic Vogon Jeltz: Toby Longworth
    * Wonko the Sane (John Watson): Christian Slater
    * Tricia McMillan: Sandra Dickinson
    * Marvin the Paranoid Android: Stephen Moore
    * The Lajestic Vantrasheel of Lob: Bob Golding
    * Nick Clarke: Himself
    * Charlotte Green: Herself
    * Peter Donaldson: Himself
    * Sir Patrick Moore: Himself



Wikipedia: http://en.wikipedia.org/wiki/Tertiary_Phase#The_Quandary_Phase