While Barry strives to become fast enough to defeat Reverse-Flash, Captain Cold returns to Central City with a partner and takes Caitlin hostage to force a confrontation with the Flash.

Brick takes three city aldermen hostage and demands that Mayor Castle turn the Glades over to him in return for their safe return. Meanwhile, Felicity turns to Ray for help…

Oliver rallies his team as Slade’s soldiers attack the city. Felicity gets a call from S.T.A.R. Labs with game-changing news and Thea comes face-to-face with her father.

A master hacker dubbed Clock King coordinates a series of raids on banks in Starling City, and his skills prove a match for Felicity. Meanwhile, Laurel’s grudge with Sara continues…

Thieves hijack medical supplies sent to Glades Memorial. Oliver gets into a heated battle with China White and her new partner, the Bronze Tiger, over the supplies. Meanwhile, Laurel makes…

An angry resident of The Glades who calls himself “The Savior” embarks on a kidnapping and killing spree to punish those he believes have wronged the residents of his neighborhood….

The next person on Arrow’s list is Diggle’s commanding officer and mentor from Afghanistan, Ted Gaynor. Oliver suspects Ted is responsible for recent armoured truck robberies, but Diggle defends Ted…