Mona is back, bitches! After a two-episode hiatus, the evil genius is back to wreck havoc on Pretty Little Liars Season 4,  Episode 17 (“Bite Your Tongue”) — and she’s teaming up with Ezra… or so we think. With so much one-on-one time with Ezra, no wonder Aria is suspicious. Or maybe she’s concerned with Mona and Mike’s new friendship. Hm, where is that headed?

Meanwhile, Hanna’s got a new interest in crime novels, which helps her come up with a plan to try and figure out whose body is in Ali’s grave — remember that plotline? While Hanna is on her hunt, Spencer works overtime to decipher the stories in Ali’s diary and find out the identity of Ali’s mystery man.

We’re worried for Spencer. Her breakdown in Episode 16 (“Close Encounters”) is going to have repercussions. Is the weight of Ali’s return getting to Spencer? And, with Hanna and Spencer both hot on the trail, will their work lead them straight into “A’s” path? Eek! Things aren’t looking good for the Liars — especially now that “A” has found ways to hide messages in teeth (yeah, we’re confused by that, too).

Watch the promo for the episode below, and tell us what you think in the comments!


Catch the next episode of Pretty Little Liars on Tuesday, January 28, 2014 at 8 p.m. ET on ABC Family.

Crystal Bell is an editor at Wetpaint Entertainment and our resident fangirl for all things Pretty Little Liars. Follow her on Twitter and Google+!