Pretty Little Liars season 6
Aria, Hanna, Spencer and Emily in hospital after being rescued by Alison, Toby, Ezra and the Rosewood policeABC Family

Pretty Little Liars season 6 returns this Tuesday with the second episode titled Songs Of Innocence, which will dig deeper into what happened to Aria, Spencer, Hanna and Emily when they were prisoners of Charles.

The episode will reveal more about Sara Harvey, who went missing the same time Alison did. Sara was rescued by the Rosewood police when they busted A's Dollhouse to save the girls.

However, the premiere episode of PLL season 6 also showed that Sara wearing the same yellow top that Ali was wearing when she went missing and was serving as one of the pawns by the masked villain. She was seen serving food to the liars through a small door.

Click here to watch the PLL summer premiere episode online for free on ABC family's official channel.

You can also watch the episode online at Hulu and iTunes.

The official synopsis of the episode 2 reads:

"The girls may have gotten out of the Dollhouse, but what happened to them during their time of captivity has lasting effects. With worried loved ones watching over them, the PLLs are home and trying to heal, with not much success. Even with suspected tormentor Andrew in custody, Aria, Emily, Hanna and Spencer fear they are far from safe. Meanwhile, Alison must deal with her past indiscretions and her notoriety around Rosewood." The following week will see the girls scrambling for answers.

Now that she is back to the normal world, she might reveal more about the character of the hooded villain who is hell bent on destroying the lives of the girls.

While the girls have decided not to speak of the torture they suffered at Charles's hand, their families are worried that the ordeal may cause psychological problems to them.

In the upcoming episode Ezra and Aria will be seen spending some quality time on a coffee date, where the former teacher will try to ask her about what happened in the dollhouse.

"I was only in that place for two minutes, you were there a lot longer," Ezra tells his former girlfriend. "So this may seem like verbally simplistic question, but are you all right..." he questions.

Aria's answer was quite dry when she says, "I'll be", and warns him strictly that she wants a big wall between "before and after".

The girls may find help from Alison as she will try to get some clues from her father about the hooded tormentor who denies knowledge of any such person in the DiLaurentis family.

Pretty Little Liars airs every Tuesday on ABC Family.