In the previous episode of 'Pretty Little Liars' Season 6, fans saw that a vital information provided by Mona regarding the time Lesli spent at Radley made the Liars eventually realize that Charles is alive.

According to a recent report in IB Times, the Liars' belief that Lesli was actually "A" was proved incorrect when Mona disclosed that her friend was unaware about Charles when she was at the sanitarium. She further stated that Lesli has just heard Charles name being mentioned when Charles and Bethany Young fled Radley.

This took place roughly around the time when the Liars presumed Charles was already dead. In the previous episode titled 'No Stone Unturned,' the Liars came to realize that Charles had actually faked his death to run away from the sanitarium.

In the 'Pretty Little Liars' Season 6 episode 7 titled 'O Brother, Where Art Thou,' which will be aired on July 21, fans will see Charles creating further trouble for the Liars. In a letter addressed to Mr DiLaurentis Charles disclosed that he was returning home for his birthday. Jason will see this as a great opportunity to know more about his brother, Charles. Meanwhile, Spencer and Hanna will also seize this opportunity to detain their tormentor. However, things will not go as these people have planned.

Meanwhile, the network has released the official synopsis for 'Pretty Little Liars' Season 6 episode 8 titled 'FrAmed,' which states that "after their latest run-in with Charles, tensions are at an all-time high with the PLLs and the town of Rosewood."

As a result of this, Ella will keep Aria under house arrest with a view to keep her safe, while Hanna will be suspecting that there is something shady behind her "unexpected scholarship money."

In addition, they will also be stopped from going for prom owing to security reasons.

In the meantime, someone will be seen having a tough time coping with the truth regarding Charles and this person is his younger sister Alison. The synopsis further states that Alison will be finding it difficult to "connect a deranged murderer to the young blonde haired boy she sees in the photos and in her memories."

A few more episodes will be aired before the truth regarding Charles as well as his identity is ultimately revealed in the Season 6 mid-season finale episode titled 'Game Over, Charles.'

'Pretty Little Liars' Season 6 episode 7 titled 'O Brother, Where Art Thou' will air on Tuesday, July 21, while episode 8 titled 'FrAmed' will air on Tuesday, July 28, on ABC Family.