Charlotte's Web

Charlotte's Web is the twelfth episode of Season 6 of Pretty Little Liars. It will air on January 19th, 2016.(Source)

Synopsis
As the girls are forced to stay in Rosewood, questions about the new mystery surface. A restless Aria starts to look suspicious as she heads back to Boston a little too quickly. But could Aria really be the one behind this? As Spencer, Emily and Hanna find themselves back in familiar territory, they aren’t happy with going about solving this puzzle "the old way." Meanwhile, Emily continues to lie about her life in California and Alison keeps a close eye on her friends.

Spoilers/Notes

 * Caleb is in the episode. Source
 * There will be a scene between Ezra and Aria. Source
 * On December 28th, 2015... In conjuction with 6.13:The Gloves Are On, the title for this episode and its synopsis were revealed in a press release.(Source)

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

 * Tyler Blackburn as Caleb Rivers
 * Ian Harding as Ezra Fitz
 * Lesley Fera as Veronica Hastings
 * Nia Peeples as Pam Fields
 * Travis Winfrey as Lorenzo Calderon
 * Lulu Brud as Sabrina
 * Roberto Aguire as Liam Greene
 * David Coussins as Jordan
 * Klea Scott as TBA

Trivia

 * Filming began on July 6th, 2015 and wrapped on July 14th 2015.