Pretty Little Liars Season 4, Episode 16 ("Close Encounters") was one of our favorite episodes of the season. Will  Season 4, Episode 17 (“Bite Your Tongue”) deliver the same combo of real chills and strong character moments? We certainly hope so, and based on the spoilers about the episode, we’re definitely excited.

To help you bide your time until Tuesday, we've rounded up the biggest spoilers about the episode right here so you can prepare for all the action.

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Hanna has a plan. Remember that whole “who is buried in Ali’s grave” question? Well, so does Hanna. According to the official synopsis of the episode, “Hanna’s new interest in crime novels helps her to come up with a plan to try and figure out whose body is in Ali’s grave.”

So does Spencer. Spencer is also up to her usual detecting. As the official synopsis continues: "While Hanna is on her hunt, Spencer is working overtime to decipher the stories in Ali’s diary which she hopes will reveal the identity of Ali’s mystery man. But with both girls hot on the trail, will their work lead them straight into 'A’s' path?" Sounds dangerous to us!

Mike's new "friend." The synopsis also teases that "Aria is upset with the new friend Mike has made." Based on the Canadian promo of the episode, we're pretty sure that "friend" is Mona. Could he be Mona's new love interest? This sneak peek hints at that.

Concern over Emily. Meanwhile, "Emily’s dad is concerned about her behavior." Well, based on how much she appears to be freaking out in the promo, we can't say we blame him...

Andrew is back. In this sneak peek we see that Andrew, Spencer's academic decathlon pal is back — and Spencer wants him to "share" his key to academic success with her. No, not notes: study drugs. Uh-oh. This can only go bad places.

So is Maggie. Here, we see that Maggie really is back, and Ezra says something that suggests he really is in a legal battle to see Malcolm. Hmmm...

Are you looking forward to this episode? Let us know in the comments below!

Catch the next episode of Pretty Little Liars Season 4 on Tuesday, January 28, 2013 at 8 p.m. ET on ABC Family.

Rebecca Martin is an Associate Editor at Wetpaint Entertainment and our resident Game of Thrones, Breaking Bad, and genre TV expert. Follow her on Twitter and Google+!