A swift kick from a horse forces Charles to sit out farm calls, so it's up to Diane to fill his coveralls. . The original dynamic duo of Dr. and Mrs. Pol have to remedy a zany little zebra, castrate a powerful racehorse, and treat a cow with teat trouble. Diane may not be a newbie, but after spending so long manning the clinic and warming the bench, does she still have what it takes to play the field with the Doc? Emergency farm calls may keep them running, but Diane and Dr. Pol are ready to prove that the family that stays together, saves together.