In last week's episode of Pretty Little Liars [1], Spencer Hastings's character takes a dark turn. As we mentioned in our recap of "Bite Your Tongue," [2] Spencer is closing in on Ezra, but all the time she's spent sleuthing has been to the serious detriment of her schoolwork. She ends up hitting up her classmate Andrew for a few of the pills from his prescription bottle, and it looks like she's heading for trouble. The synopsis for "Shadow Play," which airs next week, reveals the reason for the new noir aesthetic: "Spencer's numerous sleepless nights (with the help of prescription pills) start to take a toll on her as her hunt for Ali — and much needed answers — continues." Scroll down for the pics, and don't forget to check our recap when it airs!

Troian Bellisario as Spencer Hastings.

Source: ABC Family [4]

Spencer stands next to Toby (Keegan Allen).

Source: ABC Family [5]

Spencer looks concerned as she answers the phone.

Source: ABC Family [6]

Spencer and Toby pair up in "Shadow Play."

Source: ABC Family [7]

It's a rainy night for Aria (Lucy Hale) and Hanna (Ashley Benson).

Source: ABC Family [8]

Emily Fields (Shay Mitchell) gets dolled up in "Shadow Play."

Source: ABC Family [9]

Toby and Spencer stand under a huge portrait of Alison (Sasha Pieterse).

Source: ABC Family [10]

Spencer Hastings in Pretty Little Liars [11]' black-and-white episode.

Source: ABC Family [12]

Spencer hashes things out with Hanna and Emily.

Source: ABC Family [13]

Sasha Pieterse makes another appearance as Alison DiLaurentis.

Source: ABC Family [14]

Toby gets into full detective garb with Spencer.

Source: ABC Family [15]

Emily and Hanna pair up to confront Spencer.

Source: ABC Family [16]

Ashley Benson as Hanna Marin.

Source: ABC Family [17]

Troian Bellisario goes fully glam for "Shadow Play."

Source: ABC Family [18]