Pretty Little Liars Season 4 is heading into the home stretch, and we're desperate to know what comes next now that Mona has turned herself in for Wilden's murder. We've gathered all of the juiciest spoilers about Season 4, Episode 9: "Into the Deep" (August 6) right here.

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A surprise party. The official synopsis of the episode reveals that "Paige throws Emily a surprise birthday party with even more surprising guests — Jenna and Shana." It looks like this party might provide the perfect opportunity for Spencer and Aria to question Jenna and Shana about a shocking conversation they overhear.

The big bad is still "A". Shana and Jenna ain't got nothing on "A": " It’s 'A''s actions at the party that lead to the biggest shock of all." Could that be linked to the ambulance we see in the promo? Whatever happens, the preview pics make it look pretty bad.

The consequence of Mona's actions. "Mona’s selfless act provides Hanna and her mother with their first bit of good news, but sends Mona down a familiar path." The good news might be that Ashley is finally granted bail (though it's set very high), and we have a feeling that "familiar path" is linked to Radley.

Tough times for Ezra. Meanwhile, "Ezra gets some distressing news from Maggie regarding her and Malcolm." Could that be why Ezra has a scene with Spencer's mom? Does he need legal help involving his son? (Or maybe they're consulting about Spencer's college prospects...)

More Aria and Jake. While Ezra is distracted by his Malcolm problem, "Aria and Jake (Ryan Guzman) continue trying to define their confusing relationship." Sounds like things are heating up!

A last chance for Emily. Last week it sounded like Emily had accepted that her swimming career has gone out the window, but this week "Emily meets with a world class coach in a last ditch effort to salvage her swimming career."

Fun fact: This episode was directed by Chad Lowe, AKA Mr. Montgomery!

Find more Pretty Little Liars spoilers here.

Catch the episode on Tuesday, August 6, 2013 at 8 p.m. ET/PT on ABC Family.

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