A serial narrative is a story broken up across time, delivered in pieces rather than as a whole. Battlestar Galactica, the television series launched in 2004, is typical of a serial narrative: it has an overall narrative arc which stretches across four seasons, but, as is common for serials, especially in film and television, each episode has its own beginning, middle and end, so in effect we have many smaller stories making up a larger narrative. But these do not make up the entire tale of the Battlestar Galactica, not by a long shot. The recent TV series is itself an episode in a series of series, which extends into film, books, comics, games and webisodes, the whole of which is part of still larger traditions of science fiction, genre and religion. In fact, it is almost impossible to establish the limits of the story Battlestar Galactica, a serial within a series of series.