"Belonging" explores the tragic events that lead to Sierra's stay at the Dollhouse. Deliberately rendered paranoid schizophrenic by a Dollhouse doctor, Priya, now known as Sierra, becomes the doctor's plaything, bringing out the worst in the Rossum Corporation's pet project. In fact, Topher and Dewitt's struggles with the moral mess in which they find themselves strikes at the episode's thematic center. 

Episode Grade: A+