Toccata and Fugue in D minor

The Toccata and Fugue in D minor was a composition for organ. When the Sixth Doctor temporarily fixed the TARDIS's chameleon circuit, the TARDIS became a pipe organ, and the Doctor played the first phrase of the Toccata and Fugue in D minor.

Behind the scenes
The Toccata and Fugue in D minor is generally attributed to.

The incidental music for the film Daleks' Invasion Earth 2150 A.D. includes a jazzy variation on the Toccata and Fugue in D minor.