[s2e13] The — First Secret

Discovers her father, Byron, having an affair with one of his students, Meredith, and is sworn to secrecy.

The girls are desperate for an invite to Noel Kahn’s legendary Halloween party. [S2E13] The First Secret

The episode provides critical context for the secrets the girls kept before "A" began harassing them: Discovers her father, Byron, having an affair with

" 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 Originally aired on October 19, 2011, it serves

The episode follows the Liars—Aria, Hanna, Spencer, and Emily—during the Halloween of 2008, when Alison DiLaurentis was still the undisputed "Queen Bee" of Rosewood.

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

Fans often cite this as a top-tier episode because it fills in essential gaps in the Rosewood lore. It highlights Alison’s manipulative nature and the complex power dynamics she held over her "friends," while also planting early clues about the and the identities of those who hated her most, such as Lucas and Mona. Pretty Little Liars S2.E13 “The First Secret”