18:15Doctor Who (1963–1996)Season 15Image of the Fendahl: Part 4BBC One Duration: 25 minutes Audio described Signed Sat 19th Nov 1977, 18:15 on BBC One Northern IrelandAvailable for yearsWatch nowThea has become the Fendahl Core and Stahl realises that he is out of his depth as his followers transform into the hideous, snake-like Fendahleen.GenresDramaSciFi & FantasyBrandDoctor Who (1963–1996)SeriesDoctor Who (1963–1996): Season 15 Source: BBC Online