El sonido de los tambores
"Utopia" is the eleventh episode of the third series of the revived British science fiction television series "Doctor Who". It was broadcast on BBC One on 16 June 2007. It is the first of three episodes that form a linked narrative, followed by "The Sound of Drums" and "Last of the Time Lords". The episode serves to re-introduce the Master (John Simm), an alien villain of the show's original run who previously appeared in the 1996 television movie "Doctor Who".