Pretty Little Liars
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The season 6 finale of Freeform's "Pretty Little Liars" will feature more than one shocker with the Liars – Aria, Emily, Hanna and Spencer – finally putting into motion their plan to unmask their new tormentor, dubbed the Uber A.

According to executive producer Marlene King, the season 6 finale will be "the beginning of the biggest reveal of all." "The story then explodes after thAt!" she wrote on Twitter. King also revealed that viewers will get to meet the elusive twin in the next few episodes and hinted that viewers have seen the twin at least once before.

The internet is flooded with theories on who the twin could be and one popular theory involves the DiLaurentis family.

Andrea Parker, who played Jessica DiLaurentis, will once again feature in "Hush Hush Sweet Liars" and a section of fans believe it is Jessica who will be a twin.  As viewers know, Jessica was murdered by an unknown person in the episode "Whirly Girlie" and her body was buried in the Hastings' backyard.

The theory of Jessica being a twin gained momentum shortly after the synopsis for the finale episode revealed that Alison will experience strange visions in the episode. 

"I think it will be Jessica DiLaurentis' twin sister, tricking Ali into thinking she's going crazy," a tweet read. 

"Mar is hinting at twins in #PLL again, and I realise I've never shared my theory of Jessica as a twin. And the twin murdered her. #PLLtheory," another fan wrote on Twitter.

"Pretty Little Liars" Season 6 Episode 20 will be aired March 15 on Freeform. The synopsis of the episode, according to Wikia, reads:

With the stalker threatening to kill all of them if they don't divulge Charlotte's killer by the election, the PLLs and company, at wit's end, must boldly fight back. As Spencer and Toby work together to catch Sara Harvey, Yvonne wonders where Toby's true affections lie. Ezra finishes the last chapter of his book, finally ready to say goodbye to Nicole; Aria comforts him during this emotional time and old feelings bubble to the surface. While Caleb works intently on his plan to protect Hanna, they reflect on what could have been.

Meanwhile, Alison experiences strange visions and starts to question her sanity; Emily keeps tabs on her to make sure she's okay.