Mary and Alice continue their sisterly bonding, Ryan, Luke and Sophie are desperate and willing to do almost anything to stop them...even entertaining a dangerous proposition by Renee Montoya that finally rid Gotham of Pamela Isley. As the team hunts for the source of Poison Mary's power - and potential demise - Renee is forced to revisit her heartbreaking past. Meanwhile, Marquis grows more unhinged and throws a spectacularly sinister soiree at Wayne Tower...and everyone is invited.
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