With Hanna under arrest, things are looking worse for the Liars than ever on Pretty Little Liars. What happens next? This preview of Season 4, Episode 6: "Under the Gun" (July 16) gives us a peek at what's to come.

This is the episode where Spencer and Toby head to Ravenswood, which we get a glimpse of in this preview. Hanna, meanwhile, looks to be in deep, deep trouble ... and so's her mom. Also: Mona's back and as snarky as ever, a car gets attacked, there's an Ezria moment, and something happens that the promo calls "the strangest moment in Liars history." Color us intrigued.

Here's the official synopsis of the episode.

Hanna has some explaining to do to her parents and the police after she’s found with something she shouldn’t have. Mona spills a secret of Spencer’s to the other Liars  — leading to hurt feelings amongst the group. Emily tries to help Hanna, only to have “A” turn the tables. And Aria helps out a friend of Mike’s, who gets the wrong impression of her.

Meanwhile, Shana keeps popping up in the most unusual places. And Spencer’s investigation into who was on the other end of Ali’s mysterious phone number leads her and Toby to Ravenswood — which is unlike any place they’ve ever seen.   

Check out the preview below, and tell us what you think in the comments!

Credit: YouTube Photo: Pretty Little Liars Season 4, Episode 6 Preview: Ravenswood Time! (VIDEO)

Find more Pretty Little Liars spoilers here.

Catch the next episode of Pretty Little Liars on Tuesday, July 16, 2013 at 8 p.m. ET/PT on ABC Family.