13:45DoctorsSeries 12Episode 106: CarnageBBC One Duration: 30 minutes Thu 23rd Sep 2010, 13:45 on BBC One WalesMedical drama series. Julia's mystery guest is revealed, with shocking consequences.ContributorsJulia Parsons:Diane KeenRuth Pearce:Selina ChiltonDr Charlie Bradfield:Philip McGoughDr Heston Carter:Owen BrenmanDr Jimmi Clay:Adrian Lewis MorganDr Zara Carmichael:Elisabeth Dermot WalshKaren Hollins:Jan PearsonPatrick McGuire:Alan McKennaWriter:Claire BennettSeries Producer:Mike HobsonSeries Producer:Peter Eryl LloydProducer:Fiona PandelusGenresDramaMedicalDramaSoapsBrandDoctorsSeriesDoctors: Series 12 Source: BBC Online