Paging Paris Hilton. Martha Stewart too. Fox is planning a distaff “Prison Break” spinoff. According to “The Hollywood Reporter,” the potential new series — “Prison Break: Cherry Hill” — would be set at a women’s prison and center on Molly, a new regular character that will be introduced on “Prison Break” later this season. “Prison Break” executive producer Matt Olmstead and co-executive producer Zack Estrin are working on a script. The storyline: Molly, a upper-middle-class wife, suffers a family tragedy at the hands of The Company. She seeks out Michael at Sona to help her exact revenge.