Welcome to the Dollhouse

Welcome to the Dollhouse is the twenty-fifth episode of Season 5 of Pretty Little Liars and the 120th episode of the show overall. The episode marks the fifth season finale and will air on March 24, 2015.

Synopsis
"A" has always had fun playing with Aria, Emily, Hanna and Spencer, but now "they" have the biggest game to date in store for the girls. As shocking secrets come to light and the biggest clue to the "A" mystery is revealed, is this one plAydate the Liars can survive?

With shocking twists and turns, will the girls finally find out who A is?

Spoilers/Notes

 * There will be a Mona flashback in this episode. Source
 * Jessica DiLaurentis will be in this episode. Source
 * Lieutenant Tanner will return for this episode. Source
 * There will be scenes in Toby's apartment with Toby, Ezra and Caleb. Source
 * On November 17, Marlene tweeted, "A has a wicked sense of humor in this finale. Just ask Ezra." Source
 * There will be a scene with Alison outside the Dilaurentis house. Source
 * Andrew will be in the episode. Source
 * On November 19, Marlene tweeted, "525 will leaving you clutching your chest and gasping for breath. And then maybe you'll say 'OH NO THEY DIDN'T'". Source
 * On November 19, Marlene tweeted, "there are some similarities between 225 [S2 Finale] and 525 [S5 Finale]". Source
 * According to Keegan Allen, the real Uber A will be revealed in this episode. Source
 * Marlene King later stated that Keegan's statement was "in some ways correct" via Twitter. Source
 * In an interview, Marlene King said, "There is a twist towards the end that is by far our most demented and mind-boggling. I have goosebumps just thinking about it. We take a shocking turn and everyone was like, 'Wow, I can’t believe this is the show now.'" Source
 * "A" will be seen without a hoodie in this episode. Source
 * On February 20, Marlene tweeted, "the March 24 finale pulls 3 years together. It is the most important episode of PLL ever!" Source
 * On February 25, in response to a fan's question, "Will we know if A is one of the liars by the end of the season??" Marlene tweeted, "Yes- you will absolutely know if A is one of the Liars by the end of the finale." Source
 * We will find out if Red Coat and Black Widow is the same person in this episode.

Title and Background

 * "Welcome to the Dollhouse" is a 1995 American independent coming of age film.
 * The word "Dollhouse" refers to A's lair because A likes to keep dolls in his/her lair as seen in various episodes.

Main Cast

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

Supporting Cast

 * Ian Harding as Ezra Fitz
 * Tyler Blackburn as Caleb Rivers
 * Keegan Allen as Toby Cavanaugh
 * Lesley Fera as Veronica Hastings
 * Nolan North as Peter Hastings
 * Andrea Parker as Jessica DiLaurentis
 * Roma Maffia as Linda Tanner
 * Brandon W. Jones as Andrew Campbell

Trivia

 * Marlene finished writing the script November 5, 2014.
 * The table read was on November 11, 2014.
 * Filming began November 12, 2014, and wrapped November 20, 2014.
 * The episode is dubbed "#BigAReveal" by ABC Family across social media.