Ask a question in the box below, or search using the box above.

As you enter your question, our massive, TARDIS-sized computers will search out other similar questions. So be sure to check the list that pops up before asking your question. Once you've decided that your question has not been asked before, push the not-so-threatening blue button below.

If you want to ask questions needing speculation or people's opinions, please do it in our Watercooler forum, not here. The main Q&A space is for questions with definitive factual answers. Thanks!

To avoid spoilers in the main Q&A section, please do to not post information about stories that have not been released in the UK, or ask for information about stories that have not yet aired there.

The theme was composed by Ron Grainer, and originally arranged by Delia Derbyshire. Despite the fact that the unusual arrangement — much of which wasn't even suggested by the composition — was largely responsible for the "otherworldly" quality of the piece, only Grainer received on-screen credit for the theme.

The original theme tune has been adapted many times over the course of the show, changes usually occurring around the time one of the Doctors regenerates, but the theme always revolves around the same central elements, such as the melody and underlying rhythm, that were originally created by Grainer and Derbyshire. The most recent version of the theme, along with all versions used in the revived series, were arranged by Murray Gold, who created most of the soundtrack music for Doctor Who since 2005.