Checkmate

"Checkmate" is the upcoming sixteenth episode of the fifth season of Arrow, and the one-hundred-and-eighth episode overall. It will air on March 15, 2017.

Synopsis
Oliver gets closer to the truth about Prometheus. Meanwhile, Helix refuses to continue helping Felicity until she does a favor for them.

Production
Preparation ran from January 9, 2016 until January 17, 2017. Shooting ran from January 18 until January 27, 2017.