Emily's instability puts everything she has worked for at risk.

While Emily's mysterious blackouts threaten everything and everyone she holds dear, Victoria confronts two formidable ghosts from her past.

As Emily's blackouts grow increasingly violent, her only hope lies with the person she betrayed most, while Victoria makes a drastic move to deal with someone from her past.

As the notorious Pascal LeMarchal’s unexpected visit reverberates throughout the Hamptons, Emily and Victoria go head to head in a very public showdown.

Emily uses her newly single status to unravel a mystery from the past as Pascal attempts to make up for lost time with Victoria.

Aiden and Emily discover long-buried family secrets; Victoria pays Mason Treadwell (Roger Bart) a surprise visit as she gets closer to exposing Emily.

Emily strives to clear Jack's name; Louise and Nolan are visited by officer Ben Hunter. Emily thinks Margaux is behind it. Jack's mother comes to defend him. And with Emily they try to prove Jack's innocence. Emily asks Victoria to talk Margaux.

While dealing with grief, Emily is faced with collateral damage; Victoria goes after a new lead.

After Victoria is attacked, she takes matters into her own hands, while Emily is forced to come to terms with what she really wants.

As Emily sifts through the wreckage of her life, even her closest friends worry she has finally gone too far.

Season Finale- Backed into a corner, Emily is forced to admit her guilt, but she'll have to decide how far she'll go before admitting defeat.