Credit: ABC Family

In tonight’s episode of Pretty Little Liars, everyone is the bride! Well, at least all of the Liars. Mrs. DiLaurentis (Andrea Parker) is putting on a bridal show for charity, and the Liars have all volunteered to model the gowns. But Spencer (Troian Bellisario) has other things on her mind like whether she was involved in Ali’s attempted murder. Check out what’s going down in the Canadian promo for Season 4, Episode 23 (“Unbridled”).

“Isn’t it funny that you and I always have more in common than we think?” Spencer tells a man we think might be Jason (Drew Van Acker) standing in the foreground. Jason is back in tonight’s episode, and it makes sense that these two would have things in common given that they’re half-siblings. Is Spencer referring to the time Jason thought he might be responsible for Alison’s death?

Next, we see the Liars sitting around a table perhaps at a rehearsal for the bridal show. The venue seems country club-esque. Spencer tells the others: “If the cops are gonna questions anybody, it’s gonna be me.”

“Can we please just let my daughter rest in peace?” Mrs. DiLaurentis asks. Who is she talking to? And what prompts the outburst? Perhaps, some memories she’d rather forget. We see a shot of Alison walking away from her mother, who is standing in the dark backyard of their house. Is this a flashback? Probably.

Meanwhile, Spencer’s personal drug addiction counselor is still in town. “Be careful,” Dean (Nathaniel Buzolic) tells Spencer.

Next, we see Emily (Shay Mitchell) and Spencer in Spence’s car. “What’s that?” Emily asks. Someone has left a strip of what looks like photo negatives hidden in Spencer’s car. The photos show the silhouette of a girl Alison, maybe?

“Does this look like a guest room to you?” Mrs. DiLaurentis asks Ashley Marin when she finds her snooping around Alison’s bedroom. If you want to see more of this scene, you can check out the chilling sneak peek.

Next, we see some shots of Spencer wandering through the woods at night in her wedding dress. This is not going to end well. “You need to tell us what happened that night!” Emily tells Spencer. Finally, we see Spence in her wedding dress showing something to the Liars. They all gasp in horror. Yikes!

Check it out for yourself here!

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Catch the next episode of Pretty Little Liars on Tuesday, March 11 at 8 p.m. ET.

Kayti Burt is a contributing writer for Wetpaint Entertainment with a penchant for all things pop culture. Follow her on Twitter and Google+!