How do Billy's personalities initially manifest themselves? What is the action that initially prompts this split? What is the impact on the rest of Billy's life?

What is the impact of the multiple personalities on the rest of Billy's family and friends? List at least three incidents that occur because one of the other personalities take over.

What are the circumstances in which the personalities realize they have to keep their existence from everyone else? What are the circumstances in which their existence is revealed?

Why does Dorothy Turner go to such lengths to convince each of the personalities that she must tell someone else rather than just telling? What effect does this have on the personalities? What are other instances in which trust plays a major role in Billy's life and treatment?

Who is Arthur? Regan? David? Danny? Adelana? Kevin? Lee? Choose one...