Pretty Little Liars Season 3, Episode 16: "Misery Loves Company" (January 22) promises to be one of the most intense and exciting episodes of the season, and that's saying something!

We've taken a close look at the sneak peeks of the episode to see what we can learn about it before it airs tonight.

1. Toby and Mona have a plan. In this chilling sneak peek, Mona (Janel Parrish) and Toby (Keegan Allen) appear to have something big planned — so big that Toby's worried they're "rushing" it.

Credit: YouTube Photo: Pretty Little Liars Season 3, Episode 16 Sneak Peek: "She's In Charge" (VIDEO)

2. There's someone else in charge, and it's a "she." That same sneak peek confirms that Mona is still taking orders from someone else, and she implies that someone is female. Hmmm.

3. A special anniversary. In the sneak peek below, we learn Spencer (Troian Bellisario), with help from her mom, is planning Toby a romantic anniversary surprise. We have a feeling that's not going to end in the lovey-dovey way she imagined...

Credit: YouTube Photo: Pretty Little Liars Season 3, Episode 16 Sneak Peek: What is Spencer Hiding From Toby? (VIDEO)

4. Aria is still sick — and home alone. Below, we see that Aria (Lucy Hale) is still very ill, and she's home alone, because her dad is away and she doesn't want to bother her mom.

Credit: YouTube Photo: Pretty Little Liars Season 3, Episode 16 Sneak Peek: Would Aria Turn Byron In? (VIDEO)

5. Aria trusts Meredith. In the same sneak peek Aria insists that she trusts Meredith's motivations, which the other Liars aren't so sure about.

6. Keeping Byron's secret a secret. Aria also explains that Meredith has convinced her to refrain from telling anyone about Byron's (Chad Lowe) secret until they get a chance to talk to him. That sounds very suspicious to us.

7. Toby wants to know about Mona. Below, Emily (Shay Mitchell) and Toby chat, and Toby wonders if Mona has done anything to the Liars since she's been back. "You'd tell me if things started up again, wouldn't you?" he asks. Is he testing her? Is there information he needs? We're confused.

Credit: YouTube Photo: Pretty Little Liars Season 3, Episode 16 Sneak Peek: Should the Liars Thank "A"? (VIDEO)

8. Caleb is concerned. In this sneak peek, Caleb (Tyler Blackburn) tells Hanna (Ashley Benson) he's worried about what Mona will do now that Hanna has pissed her off. He wants to stay one step ahead of "A", but Hanna wants him to stay safe. We feel like those are mutually exclusive goals.

Credit: YouTube Photo: Pretty Little Liars Season 3, Episode 16 Sneak Peek: "I Won't Do Anything Stupid" (VIDEO)

For more on the episode, check out our breakdown of the preview.

Catch the episode on Tuesday, January 22, 2013 at 8 p.m. ET/PT on ABC Family.

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