Schism

"Schism" is the twenty-third and final episode of the fourth season of Arrow, and the ninety-second episode overall. It aired on May 25, 2016.

Synopsis
Oliver teams up with a surprising force in an attempt to stop Damien Darhk and his magic once and for all.

Production
Preparation ran from March 30 until April 7, 2016. Shooting ran from April 8 until April 19, 2016.

Trivia

 * This episode was almost universally panned by fans and critics alike with IGN only giving it a 3.8 only pointing out Neal McDonough's performance as Damien Darhk and Oliver's new job as mayor as the highlights. Aspects criticized include the dull action scenes, the depressing rather than the uplifting ending, lack of suspense and unsatisfying resolution to Oliver's season long struggle.
 * During the final showdown between Green Arrow and Damien Darhk, a cameraman can be seen actually being close to the camera filming towards the viewer's point of view..