Dark Waters - Arrow

ARROW - Wednesday, December 9th at 8pm on CW50 - OLIVER TAKES ON HIVE — After the city is attacked again, Oliver (Stephen Amell) makes a bold move against HIVE. Malcolm (John Barrowman) checks in on Thea (Willa Holland) and leaves her with a warning. Things take a horrible turn when Damien Darhk (guest star Neal McDonough) retaliates in a brutal manner at Oliver's mayoral holiday party. John Behring directed the episode written by Wendy Mericle & Ben Sokolowski (#409).  Original airdate 12/9/2015.