Check out the extended promo from The CW for Arrow Season 5 Episode 6 "So It Begins"!
In the episode, Prometheus ups his killing spree. Felicity and Curtis discover the victims have a mysterious link to Oliver’s past and this new secret could upend his new team.
Lookin for more spoilers? You can find the full episode description and more on Arrow Episode Guide: "So It Begins".
Enjoy the video below!