Last of the Drop Dead Divas (unproduced audio story)
From Tardis Wiki, the free Doctor Who reference
Last of the Drop Dead Divas, also known as Professor Bernice Summerfield and the Dyson Sphere, was an unproduced Bernice Summerfield audio story written by Jim Mortimore. The script was delivered in September 2005. (REF: Bernice Summerfield: The Inside Story)