Jason DiLaurentis returns to town and he's determined to find information leading to the recovery of Ali's remains. He even offers a $50,000 reward! This, of course, makes Hanna, Spencer, Aria and Emily (who are still desperately trying to figure out who this new "A" is) a bit nervous.

On a quest to find information, the Liars head to Philadelphia to figure out exactly what Melissa is hiding. There they find an incriminating feather in her closet. Melissa was the Black Swan! When Spencer confronts her sister, Melissa tearfully admits to wearing the costume and not losing her baby when she says she did. She explains she received a note rlong with the dress and was blackmailed into wearing it to the ball.

Elsewhere, Hanna is informed that Mona's visiting privileges have been revoked. And when she learns of Caleb's previous visit she gets extremely upset and warns him to stay out of it. Later, "A" sends Hanna a picture of a car accident in Montecito and warns her to remain quiet -- then she learns Caleb's mom was the victim. When Caleb senses that Hanna is keeping secrets from him again, he breaks up with her. Hanna is heartbroken.

Meanwhile, Emily meets Nate (Maya's cousin), who is now in Rosewood. Ella informs Aria that she knows Meredith and Byron are date. And Wilden gets a court order to see Mona.