19:20Doctor Who (2005–2022)Series 10Episode 4: Knock KnockBBC One Duration: 50 minutes Audio described Signed Sat 6th May 2017, 19:20 on BBC One West MidlandsAvailable for yearsWatch nowWhy do floorboards creak? When a sinister landlord shows Bill and her friends the perfect houseshare, they have no idea what lies ahead... knock knock, who's there?ContributorsThe Doctor:Peter CapaldiBill:Pearl MackieNardole:Matt LucasLandlord:David SuchetEliza:Mariah GaleShireen:Mandeep DhillonHarry:Colin RyanPaul:Ben PresleyFelicity:Alice HewkinPavel:Bart SuavekEstate Agent:Sam BenjaminDirector:Bill AndersonProducer:Nikki WilsonExecutive Producer:Steven MoffatExecutive Producer:Brian MinchinWriter:Mike BartlettGenresDramaSciFi & FantasyBrandDoctor Who (2005–2022)SeriesDoctor Who (2005–2022): Series 10 Source: BBC Online