致命急件Afourthseasonof12episodeshasbeenconfirmedandwillpremiereonJune23,2014onMTV.ThiswillbethefirstseasonnottostarCrystalReed.NewcastadditionsincludeMeaganTandyasBraeden(whoonlyappearedin2episodesofseason3),DylanSprayberryas"Liam",KhylinRamboasMason“anout-and-proudathlete”andMasonDyeashisbestfriendGarrett.DylanO’BrienconfirmedinaninterviewthatMaliaTate(ShelleyHennig)wouldbearegularnextseasonandjoinsthepack.