Arrow Preview: Oliver and Helena Grow Closer...But Is Her Thirst for Vengeance Too Unstable?

This week's Arrow ended with a kiss between Oliver and Helena.  After discovering Helena's secret vigilante alter ego (her attempt to get revenge on her mob boss father for his crimes), Oliver had to reconcile himself with the fact that their crusades were not all that different.

The Bertinelli family will be sticking around in next week's episode.  Oliver takes Helena under his wing and opens up to her about his plan to cleanse Starling City.  He even teaches her how to shoot with a bow and arrow.  Diggle is firmly against Oliver's plans to grow closer to Helena and doesn't believe that she can be trusted, but Oliver ignores his advice.

As it turns out, Oliver should have listened to Diggle, because Helena's thirst for revenge overrides all common sense.  When she threatens to kill the head of the Triad, all hell breaks loose in the city.  Will Oliver be forced to stop her?

Watch a preview below for the December 5th episode of Arrow.