Pretty Little Liars Season 4, Episode 17 Canadian Promo — "A"'s Creepiest Move Yet? (VIDEO)

Fancy a trip to the dentist? You might rethink the visit once you’ve seen the Canadian promo for Season 4, Episode 17 (“Bite Your Tongue”) of Pretty Little Liars. Also explored in the tantalizing new trailer: Aria’s loathing of Mona; Alison in her element; and Emily on the attack... “I was at the dentist and I think I got treated by ‘A,’” a freaked out Hanna tells the other Liars. We’d say her suspicions are right, based on the later shot of Spencer pulling a message from one of her crowns....


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