- BBC Radio 4
- Simon Jones, Geoffrey McGivern, Mark Wing-Davey, Susan Sheridan, Stephen Moore, John Lloyd, Toby Longworth, Samantha Béart and others
- Douglas Adams and Dirk Maggs
- Dirk Maggs
- David Morley
Some of the most enduring characters ever created for radio will be heard in a special live transmission from London's Radio Theatre, as part of Radio 4's Character Invasion day.
The two-headed smooth-talking alien Zaphod Beeblebrox, bemused Earthling Arthur Dent, and Marvin the Paranoid Android will relive some of their adventures, with a very special appearance by the original producer John Lloyd as The Voice of the Book.