Jenna Returns to Rosewood Tonight on 'Pretty Little Liars'

Ali (Sasha Pieterse) looks intense in this still from tonight’s all-new Pretty Little Liars.

In “Along Comes Mary,” Jenna (Tammin Sursok) returns to Rosewood and befriends another one of the Liars’ enemies, making her the PLL’s number one suspect for Uber A.

In order to leave the psychiatric hospital, Ali must be released into the care of a relative, leaving her under the suspicious watch of Mary Drake.

Spencer (Troian Bellisario) enlists Hanna’s (Ashley Benson) help to search for Caleb (Tyler Blackburn) as he’s missing in action.

Aria (Lucy Hale) and Emily (Shay Mitchell) stumble upon a secret apartment they hope will lead them to more answers.

Pretty Little Liars airs TONIGHT, July 19 @ 8PM on Freeform.