Doctor Who: Series 4 is a soundtrack album released on 17 November 2008, containing incidental music that was used throughout the fourth series of the BBC science fiction television programme Doctor Who. The music was composed by the British musical director Murray Gold and was orchestrated by his collaborator Ben Foster who had previously worked with him on the films Alien Autopsy, I Want Candy and most recently Frank Oz's Death at a Funeral.

The album's independent record label is Silva Screen Records who were responsible for the release of previous Doctor Who soundtracks, in collaboration with the BBC Radiophonic Workshop. The soundtrack features regular vocalist Melanie Pappenheim on tracks 12 and 19 and countertenor Mark Chambers on track 6.

Total running time: 76:27 minutes.