Tuesday's episode of "Pretty Little Liars" will finally solve a number of mysteries that have been plaguing the Liars as well as fans for the past few years.

Answers to who killed Toby's mother and Bethany Young, and who hit Alison on the head the night she went missing will be revealed in "Game Over, Charles", the summer finale.

Fans will also get to know who A is, and why he has been torturing the Liars all these years. But because this isn't the first time executive producer has teased at the possibility of a big A reveal, some fans are skeptical on whether Tuesday's episode is finally the end of the A mystery.

And last week, King took to Twitter to appease fans, writing: "Nowe have never been this explicit. It's NO LIE! You will know everything! @rriverforasoul #ItsNoLie #Face2Face #August11 #gAmeOver."

She also revealed that A is someone fans know, and that the A reveal will happen at the beginning of "Game Over, Charles."

"U will find out who A is at the beginning of the episode. So don't be lAte!" King tweeted. The episode will also reveal who is on the A team, and will finally reveal the identity of the Black Widow and the Red Coat.

Along with King, the cast of the show has also been promoting the summer finale of "Pretty Little Liars" and actress Lucy Hale recently stopped by Late Night With Seth Meyers" to talk about the midseason finale.

Hale also spoke about the moment she learned A's identity, saying she was still reeling from the shock. "I had no idea how they came up with it. It's pretty big. It's huge, Seth. … It's pretty out of left field."

"Pretty Little Liars" airs Tuesdays on ABC Family. The season 6 summer finale episode can be watched online on abcfamily.go.com.