The first episode looks at the importance of relationships and why they are central to emotional well-being. What are the cognitive and neurological processes underpinning everyday interactions, and can they help us understand why some relationships flourish and others fail? Viewers meet a young boy, adopted from a Russian orphanage, whose story illustrates how attachment in infancy fundamentally shapes his ability to build relationships for years to come. Viewers also meet young parents of newborn twins; a couple in therapy for a troubled marriage; a teenager who was bullied with tragic consequences; two women grappling with the stress of workplace conflicts; and others - all to better understand the importance of social connections and relationships.