Pretty Little Liars
Pretty Little LiarsFacebook/Pretty Little Liars

In the previous episode of ABC Family's "Pretty Little Liars", Spencer had a weird dream where she saw a young girl dancing in a place that looked familiar to Spencer.

However, she couldn't recognise the place, and later Mona assured Spencer it was just her imagination. But a good number of fans have come out with various theories suggesting that the place in Spencer's dream was Radley Sanitarium, and the dream was something that stemmed from her stay in the sanitarium as a child.

"I want to believe that Spencer was placed in Radley as a child and knew Charles," one theory on Reddit suggested. "I think she knows more than she can remember (repressed memory) and Charles is playing on that because he certainly remembers. Spencer is key; when she remembers whatever the hell it is she was forced to forget everything is going to come to light."

Another fan theory has it that the girl in Spencer's dream could be Bethany Young, who could have been in Radley the same time Spencer was an inmate there.

There are just a few more episodes to go before the big A reveal, and spoilers doing the rounds suggest that Alison could be the first one to learn Charles' identity. Reportedly, Alison will have flashbacks of spending time with Charles and he will reveal his true self to her in the summer finale entitled "Game Over, Charles."

Executive producer Marlene King also revealed that the midseason finale will finally unveil the members of the A team, and that Red Coat will make her final appearance in the same episode as well.

As for what's in store for the Liars in the upcoming episode, the official synopsis hints that the girls will try to gather information to confirm their suspicion that Lesli is Charles aka A.

"But as the girls ramp up their investigation, "A's" threats escalate. Meanwhile, a friend of Emily's makes her a surprising offer and Spencer is pressured by her family to make an important decision," the synopsis stated.

"Pretty Little Liars" airs Tuesdays on ABC Family.