ThefourthseasonofAllCreaturesGreatandSmallwillpickupinspringtimeof1940withchangeonthehorizonforeveryoneinSkeldaleHouse.JamesandHelenwonderwhentherighttimemightbetostartafamily,notknowingwhetherornotJameswillbecalleduptoserveintheRAF.Tristan’sabsenceisfeltbyall,butnoonemorethanSiegfriedwhoattemptstoholdthegrowinghousehold,andhimself,togetherashebravesthisnewworld.MrsHallandHelen’(🌲)sfriendshipblossomsastheylooktothefutureandnewtraineeveterinarystudentRichardCarmodyarrives,causingcomplicationsinthehouse.