19:00Doctor Who (2005–2022)Series 4Episode 4: The Sontaran StratagemBBC One Duration: 45 minutes Audio described Signed Fri 26th Nov 2010, 19:00 on BBC ThreeAvailable for yearsWatch nowMartha Jones summons the Doctor back to UNIT and modern-day Earth, but an old enemy lies in wait.ContributorsThe Doctor:David TennantDonna Noble:Catherine TateMartha Jones:Freema AgyemanWilfred Mott:Bernard CribbinsSylvia Noble:Jacqueline KingLuke Rattigan:Ryan SampsonColonel Mace:Rupert Holliday EvansGeneral Staal:Christopher RyanCommander Skorr:Dan StarkeyRoss Jenkins:Christian CookeProducer:Douglas MackinnonProducer:Susie LiggatGenresDramaSciFi & FantasyBrandDoctor Who (2005–2022)SeriesDoctor Who (2005–2022): Series 4 Source: BBC Online