Watch ‘Pretty Little Liars’ Online Season 4 Episode 21 ‘She’s Come Undone’ [VIDEO]

"Pretty Little Liars" continues tonight on ABC Family with episode 21, "She's Come Undone." In the aptly named episode, Aria will be dealing with Ezra's betrayal but while she may be upset now, it's nothing compared to the devastation she is set to endure in her search to uncover the whole truth regarding Ezra and his relationship with Alison. Last week fans watched as Aria slowly but surely began to unravel the mystery surrounding the man she once considered her long time boyfriend. While fans were disappointed that Ezra was not revealed to be "A," the fact that he admitted to his relationship with Alison was still a major surprise. Not only did the seemingly innocent Ezra admit to a relationship with Aria's former best friend, he also confirmed her worst fears--that he knew who she was before their first impromptu date at the grill.

In episode 21, "She's Come Undone" Aria will attempt to confront Ezra face to face for the first time since discovering the truth. She decides that she will talk to him before English class, but to her surprise Ezra is not there at Rosewood High. Ezra, probably anticipating Aria's outrage fled from the small town claiming that he had a "family emergency" to attend to. Considering she cannot get the answers she needs at school, Aria decides to head to Ezra's apartment. There she finds the answers she needs and even more implicating evidence that sends the young devastated Liar into a serious fit of rage. Watch "Pretty Little Liars" episode 21 "She's Come Undone" tonight on ABC Family at 8 pm. Or if you miss the live airing of Aria's emotional outburst, watch online available via live stream at abcfamily.go.com.