S4, E20: Spencer is determined to finally tell Aria what she has found out about Ezra, but Emily and Hanna are worried about what it could do to their friend. A wrench is thrown into the plan when Ezra tells Aria of his concern and suspicion of Spencer's recent addiction problem. Now with Spencer's credibility being questioned, can the girls trust what Spencer has been telling them about Ezra? Could this all be a figment of Spencer's tired brain, or is it just a clever ploy by Ezra to cover his tracks?