Doctor Who (1963–1996)Season 12The Ark in Space: Part 2BBC One Duration: 25 minutes Audio described SignedFirst broadcast: Sat 1st Feb 1975, 17:30 on BBC One WestLatest broadcast: Sat 1st Feb 1975, 17:30 on BBC One WalesAvailable for yearsWatch nowWhen the Doctor restores the power to the Ark, the humans begin to revive. But the station has been invaded by the giant insectoid Wirrn.GenresDramaSciFi & FantasyBrandDoctor Who (1963–1996)SeriesDoctor Who (1963–1996): Season 12 Source: BBC Online