S04E28: My Brother's Keeper

While hunting for a wolf, Joe is attacked by the wolf. Adam also hunting for the wolf, hears Joe struggling with the wolf comes to Joe's aid. He fires his rifle but the bullet hits Joe. Adam hurries over knocks the wolf off Joe, shoots, and then kills the wolf. The damage has already been done with the wolf bite and Adam's bullet in Joe. Adam has to rush his little brother back to the Ponderosa. Will he make it back to save Little Joe's life, since the wolf's bite is fatal?