Naomi has to work with her arch-nemesis Holly to throw a campus costume party, leading to unfortunate consequences. Navid's plan to bring down his Uncle Amal is threatened, while Silver discovers that political candidate Marissa Harris-Young is not who she seems. Meanwhile, Adrianna handcuffs herself to Dixon in an attempt to get him to stay sober and Annie must decide if she wants to give Patrick another chance.
Elenco: Shenae Grimes , Tristan Wilds , AnnaLynne McCord , Jessica Stroup , Michael Steger , Jessica Lowndes , Matt Lanter , Dustin Milligan , Jennie Garth , Jessica Lowndes , Jessica Stroup , Jessica Walter , Josh Zuckerman , Lori Loughlin , Matt Lanter , Rob Estes , Ryan Eggold , Sara Foster , Shannen Doherty .