Arrow Season 4 Episode 9: Dark Waters

Tonight is the Season 4 midseason finale of Arrow: "Dark Waters."

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.

Check out the sneak preview and 2 clips in the videos below.

Check out preview images in our gallery at the bottom of the page.

John Behring directed the episode written by Wendy Mericle & Ben Sokolowski.

"Dark Waters" episode of Arrow will air Wednesday, December 9 at 8PM on The CW.