PLL Episode 6x05 "She's No Angel"
Clues in the Episode that Aria is A
This episode sees the reluctant return of Leslie, who is supposedly Mona's childhood friend. Turns out that Leslie is being questioned by police on why she lied on the stand during Alison's trial. We learn that Leslie is not really just a childhood friend of Mona's, but that she has spent most of her childhood at Radley as a patient with psychiatric issues. She was there long enough to know both Charles and Bethany and was obviously there when Mona was a patient as well. At one point we learn that she was at one point the roommate of Bethany Young. So, Leslie looks like another pawn in A's game or perhaps a minor player. Aria seems very interested in having the girls meet with Leslie to get some answers, and if our speculation about Aria being a former patient at Radley and having ties to Bethany Young are true, she is probably using Leslie to divert attention away from the truth again.
Aria goes to the junkyard with Clark to take photographs and is of course drawn to the old dolls there. He asks her if she is into dolls and she says she finds them creepy. When Clark starts taking pictures of Aria, she become uncomfortable. We later find out that Clark is not a photography student but an undercover police officer. it is interesting that the police have an undercover cop hanging out with Aria and that he is photographing her. Makes you think that the police are suspicious of Aria too.
Aria notices a black hoodie at the junkyard and later discovers that Clark has taking a photograph of the hoodie. As Aria sees the hoodie she makes a scene and knocks over a shelf causing Clark to come see if she is okay. Perhaps Aria wanted to distract Clark from seeing/photographing A and is somehow covering for this hoodie at the junkyard. Aria later steals the negatives of the photos that Clark managed to snap of A supposedly to show the girls that A looks like a female. Could Aria just want to make sure that she was the one with the A evidence? Maybe she already suspects that clark could be a cop?
In the final A scene we see A with the pink hair dye from the dollhouse creating a doll size wig of Aria's hair. This is a big clue toward Aria because she was the last person to have the pink hair dye, and Spence even previously asked her about it and told her to turn it over to the police to ensure that the police have EVERY piece of evidence.