18:30Doctor Who (1963–1996)Season 15Underworld: Part 3BBC One Duration: 25 minutes Audio described Signed Sat 21st Jan 1978, 18:30 on BBC One CambridgeshireAvailable for yearsWatch nowThe Doctor and Leela attempt to penetrate the Citadel of the Seers to rescue Idas's father who has been sentenced to death.GenresDramaSciFi & FantasyBrandDoctor Who (1963–1996)SeriesDoctor Who (1963–1996): Season 15 Source: BBC Online