Aria, Spencer, and Hanna call the number that matches the dial tone that Tippi was singing, but no one answers. The area code is in York County. Aria says they should go record Tippi singing the phone number, but when they go back up to Spencer's room where they left the bird, Tippi is missing, and the window is open. "A" stole Tippi. The presence of Mrs. DiLaurentis in Rosewood continues to unnerve all those around her, especially when she gives Hanna a family parrot, whose gift for mimicry provides startling insight into Alison's last days. Tired of feeling defenseless against "A," Aria decides to learn self-defense and is intrigued by her sexy instructor. Meanwhile, Toby shares a heartbreaking secret with Spencer, and Hanna makes an alarming discovery regarding her mom. To complicate matters even further, "A" nearly kills the newest Liar, Mona, and makes a drastic move which leads to potentially devastating circumstances for Emily. #PLL #PrettyLittleLiars