DIXISeries 4Episode 7: Sing When You're WinningCBBCFirst broadcast: Tue 6th Feb 2018, 16:10 on CBBC ChannelLatest broadcast: Tue 6th Feb 2018, 16:10 on CBBC HDMystery drama series. It's the final presidential head-to-head debate and Billie makes an unpopular decision.ContributorsBillie:Rebecca HanssenBubs:Alex Thomas-SmithAmani:Sereece BloomfieldSelene:Sophia CapassoEcho:Marli SiuVictor:Declan Peter WyerBlake:Sam HallionJane:Annie GuyMimi:April HughesExecutive Producer:Anne BroganExecutive Producer:Melanie StokesProducer:Nina MetivierDirector:Dan BerlinkaWriter:Dan BerlinkaWriter:Nina MetivierWriter:Jon MacqueenWriter:Robert ButlerWriter:Laura MajorWriter:Eva O'ConnorGenresChildren'sDramaBrandDIXISeriesDIXI: Series 4 Source: BBC Online