19:00Doctor Who (2005–2022)Series 4Episode 7: The Unicorn and the WaspBBC One Duration: 45 minutes Audio described Signed Wed 10th Mar 2010, 19:00 on BBC ThreeAvailable for yearsWatch nowIn 1926, Agatha Christie disappeared for ten days. Was a giant alien wasp to blame?ContributorsThe Doctor:David TennantDonna Noble:Catherine TateAgatha Christie:Fenella WoolgarLady Clemency Eddison:Felicity KendalReverend Golightly:Tom Goodman-HillColonel Hugh Curbishley:Christopher BenjaminProducer:Susie LiggatDirector:Graeme HarperRobina Redmond:Felicity JonesRoger Curbishley:Adam RaynerGreeves:David QuilterDavenport:Daniel KingGenresDramaSciFi & FantasyBrandDoctor Who (2005–2022)SeriesDoctor Who (2005–2022): Series 4 Source: BBC Online