(FROM VARIETY) ? Showtime will air 20 episodes of the racy British comedy series Secret Diaries of a Call Girl, which stars Billie Piper (former star of Doctor Who). The first eight episodes of will air on Showtime this summer, with another 12 episodes set to begin shooting next year. The show features Piper as a character living dual lives: she’s a legal secretary by day and a high-class prostitute at night. The story is based on the life of an anonymous U.K. sex worker who published her diaries in 2005. HBO is working on a similar project, called Diary of a Manhattan Call Girl. The pilot has been in development for the past several months. (Variety)