Re: radio first?
You are right, and the BBC have made the same mistake on their site too.
H2G2 started as the radio series, but as well as the 5 (some might say 6) books it encompassed TV, a computer game, a towel, a stage show, TV series, more radio with the 3rd, 4th and 5th books adapted and read by the original cast, the film, and the H2G2 Live! stage show, again with the main cast, was, like Douglas' own life, cut short too soon.
What would be nice is if the BBC rebroadcast the Character Invasion recording of the stage show from last year,
Biting the hand that feeds IT
