Zombie Baby Doll Stalker

The Zombie Baby Doll Stalker is an anonymous character in Pretty Little Liars and most likely part of The "A-Team" or even "A".

Season 2
The First Secret

Alison is seen trying to find a costume for Noel Kahn's Halloween bash. While doing so, someone picks up the mask and looks at it. Later after Alison meets Jenna Marshall, the Baby Mask is standing behind her. Alison then yells "FREAK!"

Later at Spencer's house, all of the girls are getting changed as they spot Baby Mask outside. When Alison goes to see, he's gone. Aria, Emily, Hanna and Spencer later spots the same costume at the party

When they go to find Alison at the abandoned house, she says that the Baby Mask grabbed Alison but she got away. When Alison goes to get a signal in the hallway Baby Mask attacks and tries to stab her but she gets away. Alison then reveals that it was Noel

At the party, Someone in the Baby Mask costume runs behind Alison and say "Bitch" and is revealed to be Lucas Gottesman, but is he the one that attacked Ali? Then Noel comes by and says it wasn't him because he had to drive with his brother. After Ali gets a text from "A", there is a bunch of Baby Mask Monsters standing there. One hangs up the phone and takes off the mask but the identity is not revealed.

Season 3
This Is A Dark Ride

Hanna and Aria spots the Baby Mask at the brew before boarding the Halloween Ghost Train. Aria assures Hanna that it's just a costume it doesn't mean anything. The Baby Mask is later seen when Spencer is by herself and drags her away, and is revealed to be Garrett Reynolds. No one is sure if he was the one that attacked Alison because there were more people in the same costume.

'''Pretty Dirty Secrets After Lucas talks to Shana, the Baby Mask returns and whispers something to Lucas and goes behind a red curtain. Lucas hands over an envelope and then Lucas walks away.

Appearances
Season 2 Season 3 Pretty Dirty Secrets
 * The First Secret
 * This Is A Dark Ride
 * TrAde Off