By Sarah Naomi Lee. Philippa is a librarian from a long line of librarians. When her father dies and her mother loses her wits, she tries the only language her mother understands, that of the Dewey cataloguing system, to guide her back to sanity. Philippa ...... Olivia Colman Vera ...... Sheila Reid Sheila ...... Caroline Guthrie Alistair ...... Paul Rider Directed by Jessica Dromgoole.