[s2e13] The First Secret May 2026

" The First Secret " is the of the mystery drama series Pretty Little Liars . Originally aired on October 19, 2011, it serves as a prequel/Halloween special that takes viewers back to the autumn before the show's main events began. Plot Overview

Is under immense pressure to win a school election, leading to Alison manipulating the results in her favor. The Origin of "A"

While shopping for costumes, Alison meets the "new girl," Jenna Marshall. When they both want the same Lady Gaga costume, Alison attempts to intimidate her, but Jenna famously refuses her offer of friendship, marking the start of their rivalry. [S2E13] The First Secret

The girls are desperate for an invite to Noel Kahn’s legendary Halloween party.

At the party, Alison stages a terrifying "attack" by a masked assailant to test the loyalty of her friends. She is initially amused until she realizes the person she thought was her partner-in-crime (Noel) wasn't actually there for the prank. Key Character Backstories " The First Secret " is the of

"The First Secret" reveals that Alison was being stalked long before the other girls were. Throughout the episode, she receives threatening texts and a package containing a creepy voodoo doll with the message: “It’s my turn to torture you” . This suggests that "A" (later revealed to be Mona Vanderwaal) was already active and targeting Alison months before her disappearance.

The episode provides critical context for the secrets the girls kept before "A" began harassing them: The Origin of "A" While shopping for costumes,

Grapples with her sexuality, allowing a false rumor about a boy to persist to hide her true feelings.