In this sneak peek, the Liars discuss the Malcolm problem. Aria wants to leave him out of things, but Hanna (Ashley Benson) is sure Mona (Janel Parrish) did it, and thinks they should show Malcolm a pic of Mona to confirm that theory, which would prove she's still crazy and probably get her locked up again.
Spencer, notably, jumps in at this point, saying that Mona stealing Malcolm seems like a "really bold mood for Mona ... It feels desperate. Like maybe she's trying to get caught."
Is she trying to clue her friends into the truth, or get them sidetracked? Either way, Aria ends the conversation by declaring Malcolm is off limits.
For more on the episode, check out thepreview. Those of you who don't mind spoilers can learn more from theofficial synopsis of the episode.