Watch official trailer for midseason finale

CW has debuted photos and trailer for the upcomingmidseason finale, titled “Dark Waters,” and  set to air December 9, 2015.

Synopsis.

“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 (guest star Neal McDonough) retaliates in a brutal manner at Oliver’s mayoral holiday party.”

Arrow stars Stephen Amell as Oliver Queen, Katie Cassidy as Dinah “Laurel” Lance, David Ramsey as John Diggle, Willa Holland as Thea Queen, Emily Bett Rickards as Felicity Smoak, John Barrowman as Malcom Merlyn, with Paul Blackthorne as Detective Lance.

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