We're starting to get into the thick of things with Pretty Little Liars Season 4, especially now that Hanna has been arrested. What comes next? We've gathered all of the juiciest spoilers about Season 4, Episode 6: "Under the Gun" (July 16) right here.

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Enter Ravenswood. According to the official synopsis of the episode, "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." We're guessing that investigation involves mysterious house mother Carla Grunwald, who is going to be a characters on Ravenswood and is supposed to appear in this episode.

Hanna has some 'splainin to do. "Hanna has some explaining to do to her parents and the police after she’s found with something she shouldn’t have," says the official synopsis. We're guessing that means the gun she was found with last week. In this sneak peek we see her parents are very upset about this turn of events.

Spencer's secret. Meanwhile, "Mona spills a secret of Spencer’s to the other Liars  — leading to hurt feelings amongst the group." Is that why Emily is so upset with her in this sneak peek? And what do you think the secret is?

Things backfire, as per usual. "Emily tries to help Hanna, only to have 'A' turn the tables." That might explain why it looks like "A" is threatening Emily in the promo. Honestly, what did they expect would happen?

Aria and Mike's friend. "Aria helps out a friend of Mike’s, who gets the wrong impression of her." Hmm ... we wonder what that means.

Ezria in the stairwell. Speaking of Aria, we'll finally see Aria and Ezra have another one-on-one meetup, in a stairwell.

Hello again, Shana. Don't worry, the writers haven't forgotten this mysterious baddie: "Shana keeps popping up in the most unusual places." Hopefully, we'll learn more about what she's up to this week.

Find more Pretty Little Liars spoilers here.

Catch the episode on Tuesday, July 16, 2013 at 8 p.m. ET/PT on ABC Family.

Rebecca Martin is an editor at Wetpaint Entertainment. Follow her on Twitter @BeccaDMartin.