Credit: Video Still

In this super-spoilery Canadian preview for the Pretty Little Liars Season 3 Halloween special (Season 3, Episode 13: “This Is a Dark Ride,” airing October 23), Mona (Janel Parrish) hands “A” a deadly concoction — presumably meant for one (or all) of the Liars on Halloween night.

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In the preview, Mona hands “A” (whose identity is hidden in a black hoodie and black gloves) four bullets and three pills, saying, “This is going to be the best Halloween ever.” Are the four bullets meant for the Liars? And what are those pills? Are they the same ones Lucas (Brendan Robinson) was hoarding?

It won’t only be the people wearing baby monster masks who are chasing after the Liars, by the way. There’s a spooky gremlin who pops out of a fake coffin with the engraving, “RIP Alison DiLaurentis,” and a tall Joker who chases after Spencer (Troian Bellisario).

We hear Noel’s (Brant Daugherty) voice saying, “Every mess you bitches make for yourselves,” and Spencer’s voice saying, “Guess who’s not going to make it to the end of the line...”

Watch the promo below!

Credit: SpoilerTV Photo: Pretty Little Liars Halloween Special: Canadian Promo Reveals a Brand New Villain (VIDEO)

Find more Pretty Little Liars spoilers here.

Don’t miss the next new episode of PLL, the Halloween special, on Tuesday, October 23 at 8 p.m. ET/PT on ABC Family.

Molly Friedman is an editor at Wetpaint Entertainment. Follow her on Twitter @MollyFriedman.

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