Series 4

Series 4 could refer to:


 * Season 4 of the original Doctor Who series (1966-67)
 * Series 4 of the revived Doctor Who series (2008)
 * Series 4 of Torchwood - confirmed and reported to be in pre-production as of November 2009.
 * Series 4 of The Sarah Jane Adventures, commissioned for production as of 4 March 2010.