Dudley George Simpson (4 October 1922 – 4 November 2017) was an Australian composer and conductor. He was the Principal Conductor of the Royal Opera House orchestra for three years, although he is best known for his work as a composer on British television, especially his long association with the BBC science-fiction series Doctor Who, for which he composed incidental music during the 1960s and 1970s. When Simpson died aged 95 in 2017, The Guardian wrote that he was "at his most prolific as the creator of incidental music for Doctor Who in the 1960s and 70s, contributing to 62 stories over almost 300 episodes – more than any other composer."