S6, E13: Panic sets in for the Liars as the investigation turns to Radley. Aria, Emily, Hanna and Spencer find themselves back in familiar territory with the Rosewood Police Department knocking at their doors looking for answers, and their actions now affecting the loved ones around them. With her mother's job on the line, Hanna tries to come up with an alibi that could save all four of them with the help of her old high school friend, Lucas (recurring guest star BRENDAN ROBINSON). Meanwhile, Emily comes clean about the last five years, and Aria goes the extra mile to keep Ezra's second book in play with her boss.