Alison's return spelled trouble for Mona so she began recruiting an army of misfits.
Mona made it crystal clear that if you weren't with her, you were against her.
She patiently awaited Alison's return to Rosewood High.
Mike missed Mona... and let's be honest we were all secretly Team Mina all along.
Mona bought whistles for all the girls at school, but Aria didn't buy the nice girl act one bit.
Mona then poked the bear again when she asked Aria to sign Ezra's get well soon card.
Hanna remembered how Mona encouraged her to revamp her image after Alison's disappearance.
Before they did the strut of the century together at school.
Miss Vanderwaal deserved an Oscar for her "I'm the victim" performance which turned half the school against Alison.
Including Aria, Emily, Hanna, and Spencer!
As Mike and Mona got closer, Aria whispered some cruel words to Mona at the theater.
And we actually felt sorry for her!
But it wasn't long before the Liars needed Mona's help.
Could Alison really be A?
And, as usual, all roads led to Radley.
Just when Mona thought she'd won the game against Alison...
A mysterious figure broke into her home.
And a murder investigation was launched.
Mona visited Alison from beyond the grave.
Was Ali guilty of her murder?
Just as Alison was convicted of Mona's murder, a familiar face appeared in Charles' Dollhouse.
Sweet, sassy, or sadistic? Which is your favorite Mona?
Be reunited with your favorite Liars on Tuesday, June 21 at 8pm|7c on Freeform!