Pretty Little Liars’ fourth season Halloween episode “Grave New World” looks to be spooky as seen by the synopsis and new images.

The Pretty Little Liars look to be in old-fashioned moods with the costumes set in the First World War era as evident by the photo stills. Emily (Shay Mitchell), Hanna (Ashley Benson), Spencer (Troian Bellisario), and Aria (Lucy Hale) are in Ravenswood for Halloween with Ezra (Ian Harding) and Caleb (Tyler Blackburn) joining them.

The episode will find the Pretty Little Liars continuing to try to solve the mystery of A while introducing the new ABC Family spinoff series Ravenswood: “Aria, Emily, Hanna and Spencer crash the Ravenswood Founders Day Celebration after finding a clue in ‘A’s’ new lair that Ali may indeed be alive. Dressed in their finest Edwardian wear, the ladies hit the creepy cemetery party to find Ali before “A” can. But if Ali is truly alive, could the PLLs be leading ‘A’ straight to their friend without knowing it? With Ezra lurking in the shadows, ‘A’ may be closer than the girls realize. Meanwhile, Caleb heads to Ravenswood to help the girls and meets kindred soul Miranda (Nicole Gale Anderson) along the way.”

What do you think of the images from “Grave New World”? What do you think of the Pretty Little Liars’ outfits? Are you sad to see Caleb go? Why do you think Ezra is in Ravenswood?

Pretty Little Liars’ Halloween episode airs October 22 at 8 p.m. EST.

Photo Credit: ABC Family