For once (in a million times), Gordon doesn't get a chance to mess things up himself; natural fertility does. Colin has brought a case of herbs, which gets eaten by pregnant Carole and a farmer's cow. The herb is later found to induce labor, and proves quite efficient in both cases, so the vet has a double job. Meanwhile Helen tells Laura she's pregnant, with twins like Carole, which is a hereditary trait in the Brittas family--and no coincidence.