Watch A Sneak Peek From The Mid-Season Finale Of Arrow

A brand new sneak peek from the mid-season finale of Arrow has been released. This new episode is titled “Dark Waters” and it will air tonight, December 9.

In the sneak peek, Felicity struggles to remain cool about “practically being engaged” to Oliver after meeting Curtis’ husband. The couple also discusses security detail with Diggle.

So pumped for tonight’s episode!