A Bible tends to run around 10-20 pages, and provides an overall 'concept' pitch for a television series (usually 1-2 pages), as well as other key sections such as: episode break-down (generally between a paragraph and half a page on each episode), character profiles and major 'settings'. It provides a sense of the key plot lines that are likely to drive the series, as well as outlining the relationships between the characters over the course of the series and each of their individual journeys (or arcs).