Is Sara Harvey the new A? The Liars are convinced the enigmatic blonde is behind their new threats, but as per usual on Pretty Little Liars, they need actual proof. Enter super sleuthers Spencer Hastings and Aria Montgomery. That's right PLL fans, it's Team Sparia to the rescue.

In this week's episode of Pretty Little Liars ("Do Not Disturb"), Spencer and Aria work together to discover answers and find evidence of Sara's involvement before they go to the cops. MTV News has your exclusive first look at Detective Hastings in action.

When Spencer and Aria break into someone's (maybe Sara's?) room at The Radley, they uncover some blueprints that lead to a shocking revelation. If that is in fact Sara's suite, then it's possible that Sara and Charlotte have been a lot closer than we thought.

While we're not 100 percent certain of the nature of these blueprints, it seems likely that they could be the blueprints for The Radley, in which case it appears that someone was saving Room 214 for Charlotte. That's kind of macabre when you think about it. Charlotte spent more that half her life locked up in Radley Sanitarium. Why the hell would she want a room at The Radley? Unless she had no choice...

Our head is already spinning with theories.