ThefourthseasonofAllCreaturesGreatandSmallwillpickupinspringtimeof1940withchangeonthehorizonforeveryoneinSkeldaleHouse.JamesandHelenwonderwhentherighttimemightbetostartafamily,notknowingwhetherornotJameswillbecalleduptoserveintheRAF.Tristan’sabsenceisfelt