• ‘Pretty Little Liars’ (PLL) Season 7 episode 4 promo, spoilers revealed: What happens on ‘Hit and Run, Run, Run?’—Liars bury their darkest secret

‘Pretty Little Liars’ (PLL) Season 7 episode 4 promo, spoilers revealed: What happens on ‘Hit and Run, Run, Run?’—Liars bury their darkest secret (Photo : Facebook /Pretty Little Liars/ Freeform)

After an explosive segment, "Pretty Little Liars" (PLL) Season 6 is set to air episode 15. The upcoming instalment is titled "Do Not Disturb" and it will revolve around Sara Harvey (Dre Davis), who seems to be a changed person ever since Liars returned to Rosewood. Could Sara be the person behind the new threats? Does she have anything to do with Charlotte's murder? Here are spoilers for the fifteenth chapter of "Pretty Little Liars" (PLL) Season 6. Read on to find out what happens next.

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[Spoiler alert! This article contains spoilers for "Pretty Little Liars" (PLL) Season 6 episode 15 "Do Not Disturb." Do not read further if you don't want to know more about it.]

In upcoming episodes, things get intense and the lives of Liar's get even more complicated. The network has already released a press release for episode 15 of "Pretty Little Liars" (PLL) Season 6 on its official website. According to the synopsis for "Do Not Disturb," the Liars spring into action to put an end to the games.

Sara takes the centre stage as she comes under the scrutiny. The Liars suspect Sara could be behind the threats and might be involved in Charlotte's murder mystery. Spencer (Troian Bellisario), Hanna (Ashley Benson), Shay (Emily Fields) and Aria (Lucy Hale) come together to determine whether Sara is the new "A" or not.

Spencer and Aria look for evidence against Sara before they approach Rosewood Police Department.

As noted by Cartermatt, Sara's "creepy behaviour" makes her the perfect suspect for the new threats. Looking at her changed ways, the website is speculating if Sara is the new the new villain in the series.

The publication, however, denies the theory because blaming Sara seems "too easy and too convenient." It is said that she might have some hidden motives. However, "Pretty Little Liars" (PLL) has never been so obvious while dealing with the big mysteries.

Elsewhere, Caleb and Hanna continue to work as a team. They use the security footage tape to catch the new stalker. Will they succeed in their plan?

In addition, the show will delve deeper in to Aria's storyline. Aria receives surprising news from her family. Details about it remain unknown. Meanwhile, Emily finds Ali by her side when she needs a friend the most.

"Pretty Little Liars" (PLL) Season 6 episode 15 airs Feb. 9, Tuesday on Free Form. Stay tuned for more spoilers and updates for "Do Not Disturb."

While a promo for the upcoming episode is yet to be unveiled, watch a scene from episode 14 below.