Of course that raises the question: Why was Jenna driving Emily that night? Was she really the one who took Ems to Alison's (Sasha Pieterse) grave? Does that mean she's on the "A" team? Here are our top five theories about where this clue might lead.
Jenna is in league with Mona and the "A" team: This seems like the most straightforward explanation. If Mona (Janel Parrish) does have a network of helpers and Jenna is one of them, then she could have been setting Em and the other girls up on Mona's orders, or on the orders of the "A" who has replaced her.
Jenna is the new "A":Maybe Jenna is the new "A" (who may or may not be working with Mona right now). That might also explain what Jenna has been up to between leaving her summer camp and showing up at school.
Jenna was trying to hide a secret involving Ali's death: While the new "A" clearly has access to the dug-up coffin, it's possible that Jenna's interest in the grave is merely N.A.T. club/Ali's death related. Last season, she was the one who turned in Page 5; if Garrett (Yani Gellman) is right and exhuming the body would have exonerated him, she may have wanted to stop that. Maybe "A" just used Jenna's independent decision to dig up the grave to his/her own advantage.
She wasn't driving Emily to the grave: It's possible that Emily was in Jenna's car for other reasons. Maybe Jenna found her wandering around, drunk, and was actually trying to help her — perhaps she dropped her off somewhere that should have been safe, except "A" (or a minion) swept in and drove Emily to the grave instead. A little convoluted, yes, but this is Rosewood. Stranger things have happened.
Emily is remembering wrong: We doubt this is true, but we can't discount the possibility just yet.
What do think happened that night? Let us know in the comments below.
Catch an all-newepisode of PLL on Tuesday, June 19 at 8 p.m. ET/PT onABC Family.