Echo becomes an expert safe-cracker, and an invaluable piece of art is stolen from her on the engagement, forcing Sierra to take on a familiar persona. Agent Ballard gives Lubov an ultimatum, and Adelle confides shocking information to Topher.
When a traitor is discovered inside the Dollhouse, Echo and Sierra are programmed as spy hunters to uncover the culprit. Meanwhile, Ballard receives surprising news from Mellie, and Adelle harbors a secret.
When Adelle’s wealthy friend is murdered, Adelle imprints Echo with the woman’s memories and personality to solve the case. Ballard looks into Mellie’s past, and Topher secretly programs Sierra for an engagement.
Agent Ballard's investigation into the Dollhouse gains momentum when he gets a photo of Echo. Meanwhile Echo and some of the other Actives start to show signs of self-awareness, making Adelle and the handlers nervous.