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ItreturnssixmonthsaftertheshockingfinaleofSeason3,andtheteammustovercometheirgrieftotackleadangerouscrimewave.Thistime,theglovesarewellandtrulyoffforProfessorTinhislecturesandanewmusicalpursuit,romanceisverymuchaliveforhismotherAdelaideTempest(DelaTour),andthelinesbetweenprofessionalandpersonalbecomeblurredfortherapistHelenaGoldberg(Stevenson).Meanwhile,DIMaiyaGoswami(SunetraSarker)takeschargeofthepoliceforcewithseriesfavoriteDSDanWinters(White)fiercelyathersidebbb
