Pretty Little Liars is two-for-two. It's aired a pair of episodes so far, both of which have kept viewers captivated and curious to learn more about the show's main characters.

Read our full review of this week's "The Jenna Thing" NOW.

Looking ahead, ABC Family has a new episode on tap for Tuesday, June 22. Titled ""To Kill a Mocking Girl," it will feature a new, mysterious individual, one who may be able to reveal the secrets Aria and company are trying so hard to keep quiet.

Check out the official promo for this installment now:

[video url="http://www.tvfanatic.com/videos/to-kill-a-mocking-girl-promo/" title="To Kill a Mocking Girl Promo"] [/video]

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.