The Sound of Drums

"The Sound of Drums" is the twelfth episode of the third series of the revived British science fiction television series Doctor Who. It was broadcast on BBC One on 23 June 2007. It is the second of three episodes that form a linked narrative, following "Utopia" and followed by "Last of the Time Lords".

In the episode, set in the 21st century, the alien time traveller the Master (John Simm) uses a network of mobile phone satellites to hypnotise the world and influence the population of the United Kingdom into electing him Prime Minister. Following the election, he makes contact with an invading race he calls the Toclafane.