S5, E18: Aria, Emily, Hanna and Spencer have been burned before by newcomers to Rosewood, so it's no surprise they are wary when someone new crosses their path. Spencer lets down her guard a bit as she spends more time with Jonny (recurring guest star WILL BRADLEY), and Emily continues to try and figure out Talia (recurring guest star MIRANDA RAE MAYO) as she keeps getting mixed signals from her co-workers. When Mona's friend Lesli (recurring guest star ELIZABETH McLAUGHLIN – The Clique) shows up in town, Hanna is tasked with finding out her back story to determine if Lesli is really who she says she is. Are the girls wise to keep an eye on everyone, or can they allow a bit of comfort room without worrying about an "A" trap? Meanwhile, Aria becomes concerned about Mike's (recurring guest star CODY ALLEN CHRISTIAN) recent behavior and Holbrook (recurring guest star SEAN FARIS) returns to town.