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In page Doctor Who:

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Most of the innovative incidental music for Doctor Who has been specially commissioned from freelance composers, although in the early years some episodes also used stock music, as well as occasional excerpts from original recordings or cover versions of songs by popular music acts such as The Beatles and The Beach Boys. Since its 2005 return, the series has featured occasional use of excerpts of pop music from the 1970s to the 2000s.[citation needed]