The CW has released the plot synopsis for the "Arrow" midseason finale, "Dark Waters," and it looks like Oliver (Stephen Amell) is taking the fight to HIVE -- though that may not be the best idea, as it's said Damien Darhk (Neal McDonough) will retaliate in a "brutal manner" at Oliver's holiday party. Sounds like a very unhappy holiday season for Team Arrow -- here's the official description:
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).
"Dark Waters," the ninth episode of "Arrow" season four, airs 8 p.m. on Wednesday, Dec. 9 on The CW.