<P> In a nightmare that Alison had during "How the' A' Stole Christmas", her mom, Jessica DiLaurentis shows up as the Black Widow . </P> <P> The Queen of Hearts is a previously anonymous character that made an appearance during the third season's Halloween special, "This Is a Dark Ride". In the fourth season's premiere, it is revealed that there were actually two of them in the Halloween train, Melissa Hastings and Darren Wilden . Wilden attacked Spencer and fought Paige, while Melissa drugged Aria and took her body . Wilden also murdered Garrett Reynolds fearing he'd expose his corrupt activities and Melissa later admits to Spencer that she was blackmailed into doing his bidding . However, in Mona's footage, evidence shows that Wilden tried to abandon the train and Melissa is heard ordering him to stay . Wilden would later place a fainted Aria in a box beside Garrett's corpse and then gathered with Melissa in an attempt to push them off the train . They fled the scene once Aria regained her consciousness and stabbed Wilden . </P> <P> The Black Swan is a previously anonymous character that made an appearance during the Masquerade Ball . Melissa was revealed to be the person behind the disguise in "Birds of a Feather". She claimed that "A" (Mona) threatened her, stating that her false pregnancy would've been exposed if she did not distract Jenna during the event . The disguise is inspired by Odile from Swan Lake . </P> <P> Of course, the black hoodie has been the most significant disguise over the years and probably the most well known . Almost every single "A" has worn the signature black hoodie and it will be one of the biggest things for as long as Pretty Little Liars will be remembered . The disguise has been used by Mona, Charlotte, Toby, Spencer, Lucas, Sydney, Aria, Wren, and Alex . </P>

Who are the a team in pretty little liars