"Hexagonal Phase" has been adapted from Eoin Colfer's spin-off novel 'And Another Thing...', which was commissioned to mark the 30th anniversary of the first novel. John Lloyd- who wrote and lived with Douglas Adams- will be playing The Book.
Simon Jones will return to his role as Arthur Dent as he travels through space and time in his dressing gown.
Jones said he was amazed and delighted to still be playing the role four decades on, and reassured fans that he's still got it: "It seems extraordinary that it's been forty years since we recorded the first pilot episode for BBC Radio; how modest were our expectations then, and how incredible a world-wide phenomenon it became, and continues to be". "How modest were our expectations then, and how awesome a world-wide phenomenon it became - and continues to be".
It's been 12 years since fans were treated to a big screen adaption of the show, starring Martin Freeman and Bill Bailey. "Still, the dressing-gown and towel may be a little threadbare, like my hair, but my voice, much to my surprise, hasn't changed a decibel, and despite years in America, I can still talk Arthur's "indignant-posh".
The series will be produced by Dirk Maggs, who was chosen by Adams to bring the story back to the radio.
He said the series promised to be the "wittiest and most epic adventure yet".
"Over the years, we've lost some great friends, and we still miss them, but we've also gained other valued colleagues, and for this trip across the Galaxy we have a tip-top team all ready to do justice to Douglas's unique and quixotic vision".