The Pretty Little Liars cast and crew sometimes tweet pics from set, and it's always fun to see what's going on behind the scenes. But rarely are the photos as intriguing as this pic from the set of Season 3, Episode 18. Read spoilers at your own risk! For more on Wetpaint Entertainment's philosophy on spoilers, click here. PLL writer Lijah Barasz tweeted this photo, saying "Shay and Drew on the set of #PLL Ep. 318." And we must say, we have a lot of questions.