17:45The Sarah Jane AdventuresSeries 4Episode 8: The Empty Planet: Part 2CBBC Duration: 28 minutes Audio described Signed Thu 5th May 2011, 17:45 on CBBC ChannelAvailable for yearsWatch nowChildren's science fiction drama. Clyde and Rani race against time - but what is the secret of the robots?ContributorsSarah Jane Smith:Elisabeth SladenClyde Langer:Daniel AnthonyRani Chandra:Anjli MohindraHaresh Chandra:Ace BhattiMr Smith:Alexander ArmstrongCarla Langer:Jocelyn Jee EsienGavin:Joe MasonRed Robot:Paul KaseyYellow Robot:Ruari MearsVoice of Robots:Jon GloverProducer:Brian MinchinDirector:Ashley WayWriter:Gareth RobertsGenresChildren'sDramaBrandThe Sarah Jane AdventuresSeriesThe Sarah Jane Adventures: Series 4 Source: BBC Online