This is Gallifrey: Our Childhood, Our Home

"" was a piece of music written by Murray Gold for Doctor Who. It appeared throughout the series 3 finale, Utopia / The Sound of Drums / Last of the Time Lords. It was rearranged for The Doctor's Daughter and The End of Time. Other rearrangements play in The Name of the Doctor, The Time of the Doctor, Extremis, The Lie of the Land, and The Doctor Falls.

Episodes used in

 * Utopia
 * The Tenth Doctor meets Professor Yana.
 * The Doctor fixes Yana's machine.
 * Yana tells the Doctor about his alleged childhood.
 * Yana begins regaining his memories of his true identity.
 * The Sound of Drums
 * The Doctor, Martha Jones, and Jack Harkness run for their lives.
 * The Doctor describes Gallifrey and the source of the Master's insanity.
 * Last of the Time Lords
 * The Master dies in the Doctor's arms, refusing to regenerate, and the Doctor subsequently burns the Master's body. The first instance where the song is used in full.
 * The Doctor's Daughter
 * The Doctor describes how Gallifrey was destroyed in the Last Great Time War.
 * Forest of the Dead
 * The Doctor tells the Vashta Nerada to "look [him] up".
 * The Stolen Earth
 * Torchwood Three and Sarah Jane discover the Dalek Cruciform.
 * The Doctor and Donna leave the Shadow Proclamation.
 * The End of Time
 * The Master talks to the Tenth Doctor about their childhoods on Gallifrey and what they have become.
 * Rassilon and the Time Lords meet on Gallifrey to discuss the war.
 * The Name of the Doctor
 * The First Doctor steals the TARDIS on Gallifrey and runs into Clara Oswald. Clara encounters multiple other incarnations of the Doctor
 * Clara tells the Eleventh Doctor about the message she received regarding Trenzalore
 * The Time of the Doctor
 * The Time Lords send the Eleventh Doctor a new regeneration cycle through a crack in time as he is about to die.
 * The Doctor Falls
 * The Twelfth Doctor deduces how the Saxon Master ended up on the Mondasian Colony Ship. The Master shows the Doctor the mass cyber-conversion factory and the Doctor reveals to both the Master and Missy that the Cybermen have been reprogrammed to hunt Time Lords as well as humans.