(Nikki Nelson/WENN.com)

Not who everyone thought she was.

In this week's Throwback Thursday Soaps.com takes readers back to February 2009 when Mary Jane Benson (not to be mistaken with Mari Jo Mason) appeared and was later revealed to be Patty Williams…

It appears Leslie and Tyler Michaelson are hiding something about their past, and a few years ago Mary Jane Benson was as well. Victor Newman had a plan to once again seek revenge on Jack Abbott and brought a woman named Mary Jane Benson to Genoa City to do just that. He paid for the woman to have plastic surgery in order for her to get close to Jack.

Though Mary Jane convinced Jack to hire her at Jabot, once Jill regained control she fired them both. It wasn't long before Katherine, who had been presumed dead, was found alive - and still in charge of Jack's family business. Katherine rehired the Abbotts, as well as Mary Jane, who seduced Jack into falling for her.

Things turned suspicious when Paul Williams found that there was something very familiar about Mary Jane. Viewers were soon privy to the fact that Mary Jane was in fact Patty Williams. Victor started to worry about Mary Jane's sanity. He tried to get her to leave town, but she refused… and so began Patty's reign of terror over those who had ever wronged her.

Do you remember what position Jack gave Mary Jane? Vote in our poll…

Also, vote in our Throwback Thursday B&B Poll: Dayzee Meets Stephanie.

Can't wait until the next "PLL" episode to see what's going to happen? View Soaps.com's Pretty Little Liars Spoilers to find out who Hannah thinks is keeping secrets.

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- Amy Mistretta