"Pretty Little Liars" season 4 episode 19 is Spencer's black and white episode. The Liars are getting good while unearthing clues, but Spencer's pill popping habit can be dangerous for her. The episode is titled "Shadow Play."

Promo for "Pretty Little Liars" Season 4 Episode 19

Credit: YouTube/Pretty Little Liars Promos

Liars and Ali meeting.

In the next instalment of "PLL," the Liars and Ali would meet. Liars want Ali back, and she asks Aria if she is sure about that.

A shocking moment.

In the promo for "Pretty Little Liars" season 4 episode 19, the Liars and Ali look back at something. What is it? It will be revealed during the episode.

The kiss by a window.

There is a kiss in the promo. It is hard to tell who the guys are as they are silhouetted. They are wearing dresses, so they could be Paige and Emily.

Alison and Spencer scenes.

It might be Alison vs. Spencer on "PLL" season 4 episode 19. In one of the scenes, Ali raises her hand to hit a Liar. However, Hanna jumps and stops her by grabbing her arm.

Toby and Spencer.

All is not well between them. Spencer is on a pill-popping spree, and she might start doubting her boyfriend again. In one of the scenes, Toby grabs Spencer's wrist and tells her to "snap out of it."

Aria meets Ezra.

Aria approaches a man (silhouetted) who can be Ezra.

Official Synopsis for "Pretty Little Liars" Season 4 Episode 19

"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. As she pours over newly acquired information, her world view takes a black and white turn. Now teleported into the world of 1940's Film Noir, Spencer tries to come up with the answers she and her friends have been desperately looking for. But in this world of fedora hats, switchboards and 15 cent coffee, can Spencer finally put all of the pieced together that lay in front of her?"

"Pretty Little Liars" season 4 episode 19 airs Tuesday, February 11, 2014 on ABC Family at 8 p.m. ET.