Doctor Who EnhancedKnock KnockBBC One Duration: 45 minutesPlug in your headphones to experience Doctor Who with 3D sound in this special binaural audio mix – it’s virtual reality for your ears. Show more 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 Enhanced Source: BBC Online