THE CIRCLE COMPLETES IN THE HEART-WRENCHING SEASON FINALE OF THE BABY BORROWERS – The teen couples have experienced all stages of parenthood, from infants, toddlers, pre-teens and teens, but now is the final test of adulthood -- taking care of senior citizens. While taking care of the elderly -- all with individual levels of mobility and various ailments, the couples all get the chance to learn about their lives, relationships and touching life experiences. After becoming close to the seniors, the teens must say goodbye and reflect on what they have learned during the social experiment. The episode closes with updates on where each of the couples are now.