Arrow › Season 4

S4 E9: Dark Waters

After the city is attacked again, Oliver makes a bold move against HIVE. Malcolm checks in on Thea and leaves her with a warning. Things take a horrible turn when Damien Darhk retaliates in a brutal manner at Oliver's mayoral holiday party.

Air date	Dec 9, 2015
Runtime	42 minutes
TMDB rating	★ 7.9/10