Series 1

Series 1 could refer to:


 * Season 1 of the original Doctor Who series (1963-64)
 * Series 1 of the revived Doctor Who series (2005)
 * Series 1 of Torchwood (2006-07)
 * Series 1 of The Sarah Jane Adventures (2007)
 * Series 1 of the K-9 (TV series). (2009/2010)
 * The 5th series of the Doctor Who revival (2010) is also being referred to as "Series 1" by the BBC.