In Pretty Little Liars Season 4 Episode 23, the girls are going undercover as charitable Liars when they help Mrs. DiLaurentis to try to find out what she's up to when it comes to Ali.

These photos leak a surprise that wasn't shown in the promo -- the return of the blood that ties Spencer to Ali -- Jason DiLaurentis!

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Pretty Little Liars Quotes

Alison: It's like you went to sleep one night and forgot who I am.
Aria: I know exactly who you are. A.
Alison: Stop saying that.
Aria: Why should I? You're A! You stole the game from Mona and then you killed her because she had proof.

Emily: Ali's going on trial for murder, she's trying to take us all down with her, and I keep trying to figure out if a girl is flirting with me or not.
Caleb: Well in the middle of a war, you have to remember what you're fighting for.