She's Come Undone

She's Come Undone is the twenty first episode of Season 4 of Pretty Little Liars. It is set to air on February 25, 2014.

Title and Background

 * It can refer to Aria breaking down after she finds out about Ezra being A, similar to what happened to Spencer in season 3B.
 * It's a coincidence that 4x21 of The Vampire Diaries is the same title as 4x21 of Pretty Little Liars.

Main Cast

 * Troian Bellisario as Spencer Hastings
 * Ashley Benson as Hanna Marin
 * Shay Mitchell as Emily Fields
 * Lucy Hale as Aria Montgomery
 * Sasha Pieterse as Alison DiLaurentis
 * Janel Parrish as Mona Vanderwaal

Guest Cast

 * Keegan Allen as Toby Cavanaugh
 * Lindsey Shaw as Paige McCullers
 * Lesley Fera as Veronica Hastings
 * Nolan North as Peter Hastings
 * Sean Faris as Gabriel Holbrook

Trivia

 * Jonell was making the final tweaks to the script on September 22, 2013.
 * The table read was on September 24, 2013.
 * Filming began September 26, 2013.