Every official* theme variation presented in chronological order, transitioning as smoothly as possible from one to the next.*Criteria here used being that the arrangement must have served as single the current arrangement at the time. David Arnold's version is included due to the fact that for several years, the Big Finish 8th Doctor audios were the only 'new' and 'current' Doctor Who. Scream of the Shalka is omitted due to being sadly overtaken (and rendered 'non-canon' insofar as anything in Doctor Who can be said to be a part of canon) by the New Series.