Mona Rocks the Crazy Eyes in These Sneak-Peek Photos From Tonight’s Pretty Little Liars Episode: See Them Here!

Pretty Little Liars
Mona (Janel Parrish) looks like she's getting into an intense convo in these exclusive behind-the-scenes photos from the July 21 episode of Pretty Little Liars; see the pics here! ABC Family/Eric McCandless

Us Weekly and Pretty Little Liars have partnered up again to bring you a sneak peek at each week's new episode with behind-the-scenes photos. Scroll down for more on this week's pics, and check back every Tuesday morning to see new ones.

Mona's locked up, and you know what happens when that happens!

In these sneak-peek photos from tonight's Pretty Little Liars' episode (titled "O Brother, Where Art Thou"), it looks like Mona (Janel Parrish) is still grounded (while occasionally managing to escape to labs, of course). But the Liars, including Hanna (Ashley Benson) and Spencer (Troian Bellisario), are giving the teen fiend some visitors, and she looks a little shock-eyed about the whole thing.

Janel Parrish - Pretty Little Liars
Janel Parrish gets intense in character as Mona on Pretty Little Liars. ABC Family/Eric McCandless

While we don't have too much scoop on tonight's plot—besides that, like winter, Charles is coming—we do have a behind-the-scenes look at the PLL actors getting themselves ready to shoot. Check out this child's-eye view of Mona's bedroom, sans roof! (The better to soundstage, my dears.)

Keegan Allen - Pretty Little Liars
Keegan Allen flashes his Toby grin in the July 21 episode of Pretty Little Liars. ABC Family/Eric McCandless

Plus, see Travis Winfrey and Keegan Allen getting into costume to play Officers Lorenzo and Toby, respectively—such handsome chaps. And then of course we have this close-up on Parrish as Mona—who, to be honest, looks like she's about to go wild on some Liars. Or Lesli? Who knows?!

Travis Winfrey - Pretty Little Liars
Travis Winfrey gets the finishing touches on his Lorenzo costume behind the scenes of the July 21 episode of Pretty Little Liars (Season 6, episode 7). ABC Family/Eric McCandless

All we know for sure is what executive producer I. Marlene King told Us. "As Alison and the PLLs get closer to learning A's identity, our masked stalker chooses to end the game with a bang," she said, while promising that there will still be plenty of humor in the episodes, too. (Never forget #DrugFreeDean.)

Tune into PLL Tuesdays at 8 p.m. ET on ABC Family. And be sure to tweet your best Charles theories to @UsWeekly using the hashtags #PLL and #stylebyUs!

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