<P> In "Scream For Me", "Big A" walks through Spencer's room, flipping up a hidden panel under a couch cushion that ultimately opens up a secret compartment at the Hastings house . </P> <P> During "March of Crimes", "Big A" is at the Optometrics office Spencer frequented, eavesdropping on what is happening to Ali at the police station through the usage of her mp3 player . </P> <P> In "A Dark Ali", "Big A" folds laundry, including a striped candy pinafore . </P> <P> During "Taking This One to the Grave", "Big A" allegedly murders Mona Vanderwaal . She later replaces the baby Jesus ornament with a Mona doll and opens up the trunk of her car, revealing Mona's body . She then makes a snow globe with the picture of The Liars . </P>

When do they find out cece is a