We know Shana shows up again in Season 3, Episode 20: "Hot Water." For those of you who need a refresher, here are five things we know about her, from spoilers and Pretty Dirty Secrets.
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She’s a “troublemaker.” Marlene told TVGuide that Shana is a “Rosewood troublemaker.” It’s unclear whether Marlene means that Shana already has a history of causing mischief and trouble in Rosewood, before Alison (Sasha Pieterse) died, or if she’s started causing trouble since arriving in town before Halloween.
Paige knows her. In one PDS webisode, we got a good look at Shana’s phone, including her recent calls. We saw that she had a missed call from Paige (Lindsey Shaw), which could explain how Shana knows about the Liars and their business. What's their history? We can't wait to find out!
The Shana/Missy Franklin connection. Olympic swimmer Missy recently explained that her upcoming cameo will feature Shana and Emily. Missy (who plays herself) will run into Shana at an airport, and Shana will insist on introducing Missy to Emily at The Brew. How do these two know each other? And is Missy implying that Shana and Emily are friends by that point?
Shana was some kind of spy. In PDS, Shana was often on the phone talking to an unknown caller. At various points in the web series, Shana told the other person who she had met (Noel [Brant Daugherty], for example), and whether or not “they” had all stopped into the Halloween store. Since she had photos of all the Liars’ costumes on her phone, we’re wondering if she was either spying for “A” or for someone we still don’t know about.
Her link to Alison. When we first meet Shana, she says that she’s originally from New York, but grew up in South Carolina. As fans will remember, in a flashback scene from Season 1, Episode 12: “Salt Meets Wound,”Spencer (Troian Bellisario) asks Alison why her luggage tags say Hilton Head, South Carolina on them when Ali had said she was visiting her grandma in Georgia. Ali couldn’t really get out of the lie, and made up a suspicious excuse. Did Shana get to know Alison in SC? And since Ali had just gone to SC days before she disappeared, does Shana know more about who killed her?