Here are 3 reasons why Jenna might be the unsuspecting victim next week.
Toby’s revenge. Now that we know Toby (Keegan Allen) is off his rocker (he’s on the “A” team, which is enough evidence for us), it’s possible that he’s still peeved about his past with Jenna. As fans know, Jenna seduced Toby into having a quasi-incestuous relationship when they were younger. That can damage any young mind, especially if you’re a would-be “A” team member. For all we know, he could have been harboring some major resentment towards his step-sister for years now. What better time for those feelings to come to the surface than now?
Garrett’s revenge. Another twist on the above theory is that Garrett kills Jenna out of jealousy, or because of what she did to him. Remember: Jenna is the one who turned Garrett into the police in the first place by showing them Page 5 from Alison’s (Sasha Pieterse) autopsy report (which they’d stolen together), and claiming that Garrett wanted her to hold on to it. Then, his fate grew much worse when he became the likeliest suspect in the Maya (Bianca Lawson) murder case. Even though he’s been released from jail, his reputation in Rosewood is pretty much ruined, and he won’t be working as a cop anytime soon. If there’s anyone to blame, it would be Jenna.
If Alison is still alive... Since we know we’ll learn something major about Alison in this episode, one theory is that she’s still alive, and she’s coming for Jenna. On the last Halloween episode (Season 2, Episode 13: ”The First Secret”), much of the tension throughout the episode was between Ali and Jenna, then the new girl. Now that Jenna has taken over as the queen bee, Alison might want to remove that crown — for good.