Grave New World

4x13 is the thirteenth episode of Season 4 of Pretty Little Liars, it also the latest Halloween Episode. It will air in October 2013 and is currently under production. It will be written by Joseph Dougherty, I. Marlene King, and Oliver Goldstick.

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

Guest Cast

 * Tyler Blackburn  as  Caleb Rivers
 * Janel Parrish as Mona Vanderwaal

Special Guest Cast
Ravenswood Characters
 * Nicole Gale Anderson as Miranda
 * Brett Dier as Abel
 * Elizabeth Whitson as Olivia
 * Britne Oldford as Remy

Trivia

 * Joseph tweeted Halloween, with I. Marlene King and Oliver Goldstick, when asked about what he writing next.